{"title":"Amplificadores de tubos","description":"","products":[{"product_id":"conrad-johnson-art150-amplifier","title":"Conrad-Johnson ART150 Amplifier","description":"\u003cp\u003eConrad-Johnson equipment is one of our first loves in Hi-Fi. The ART150 renews that love, drives my home system, and is the amp I'll be buried with. - Joe Parvey\u003c\/p\u003e\n--\u003cbr\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_0\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/conrad-johnson-ART300-awards.png\" title=\"\" class=\"wp-image-3764\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_0 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eART150\u003c\/h1\u003e\n\u003ch4\u003eIn celebration of our 40th anniversary, conrad-johnson has introduced two new ART amplifiers: the ART150 stereo amplifier.\u003c\/h4\u003e\nThis amplifier is designed for our own reference use as well as for industry professionals and dedicated audiophiles. As with previous anniversary products, this amplifier will be offered as limited edition, with just 250 units of the ART150 to be sold through selected conrad-johnson dealers and distributors. \u003cbr\u003e\n\u003ch4\u003e\u003c\/h4\u003e\n\u003ch4\u003eThe ART150 amplifier embraces our firm belief that the surest path to both state-of-the-art musicality and exceptional reliability is to keep the circuits simple and build them with the finest available parts.\u003c\/h4\u003e\n\u003cbr\u003eThe audio circuit of the ART 150 and the mono block ART300 amplifiers has just three elements, each as simple as possible, and each essential to the operation of the amplifier. A voltage gain amplifier (a single triode) is direct-coupled to a cathode coupled phase inverter (each phase handled by a single triode), which in turn drives the output stage. Power is developed by KT150 output tubes, chosen for their musical accuracy, high power, and reliability. A single pair is used for each channel to comfortably and reliably achieve the 150 Watts per channel power rating of the ART150, while two pairs are used to produce 300 Watts in the mono ART300. A small amount (about 12 dB) of loop negative feedback reduces distortion and achieves a sufficiently high damping factor to control reactive loudspeaker systems. To assure continued peak performance, the owner need only make a simple bias adjustment when new tubes are installed. Built in LED bias indicators allow the user to make this adjustment using only the supplied adjustment tool. \u003cbr\u003e\n\u003cblockquote\u003eSeparate, low impedance, discrete dc power supply regulators are provided for the input and phase-inverter stages, thoroughly isolating these stages from the power demands of the output stage. These power supplies are designed to maintain a rock solid supply at all audio frequencies.\u003c\/blockquote\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ART-150_2a_480x480.jpg?v=1641484346\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ART-150_2a_480x480.jpg?v=1641484346\" data-mce-fragment=\"1\"\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_1\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_1 et_pb_text_align_justified et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003ch4\u003eThe ART150 amplifier maintains the exacting quality standards for which conrad-johnson is internationally known.\u003c\/h4\u003e\n\u003cbr\u003eResistors are precision laser-trimmed metal foil types. CJD Teflon dielectric capacitors are used for coupling the inverter stage to the output stage, and to bypass the large value polypropylene capacitors in the regulated power supplies. Proprietary wide-bandwidth output transformers contribute to excellent high frequency performance. Even the machined gold plated OFC connectors and the internal wiring have been carefully selected for optimal sonic performance. Attention to every detail enable us to extract the full potential from our circuit designs and ensures that our products will perform to this potential for years to come. The ART150 and ART300 are built without compromise to achieve a new standard in musical performance, and they are built to last.\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"c-j's core sonic attributes are oustanding neutrality, transparency, resolution, and transient speed, lifelike dynamic slam and immediacy, precise and stable imaging, three-dimensional soundstaging, lack of grain, and a low noise floor ... My recommendation? Buy it, listen to it, and love it for a long time in good health. It doesn't get any better than this\" \u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\nStephen Scharf - The Absolute Sound, February 2022\u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_2 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e Power: \u003c\/td\u003e\n\u003ctd\u003e150 Watts rms per channel from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e1.0V rms to rated power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response (at 10 watts)\u003c\/td\u003e\n\u003ctd\u003e20 Hz to 20 kHz, +\/- .25 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHum and Noise\u003c\/td\u003e\n\u003ctd\u003e108 dB below rated power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e100 kOhms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Complement\u003c\/td\u003e\n\u003ctd\u003eART150 – 3 x 6922, 4 x KT150 \u003cbr\u003eART300 – 2 x 6922, 4 x KT150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e16.3125D x 19W x 8.75H inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eART150 80 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cstrong\u003e3-Year Warranty\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003eEvery conrad-johnson ART Amplifier is patiently and carefully hand assembled, then individually inspected and its performance verified by an experienced audio technician. \u003cbr\u003e\n\u003cblockquote\u003eThe owner is protected by our three-year limited warranty covering labor and parts except vacuum tubes.\u003c\/blockquote\u003e\n\u003cbr\u003eService is a top priority at conrad-johnson. In the event that a product does require service, it will be handled promptly and efficiently\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Reviews\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_3 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/HIFI-Awards-Power-Amplifier-Conrad-Johnson-A300.pdf\" class=\"et_pb_button et_pb_button_0 et_pb_bg_layout_light\" target=\"_blank\" data-mce-href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/HIFI-Awards-Power-Amplifier-Conrad-Johnson-A300.pdf\"\u003eHIFI+ Amp of the Year\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_1_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/positive-feedback.com\/audio-discourse\/conrad-johnson-40th-anniversary-art300-monoblock-tube-amplifiers-part-1-forty-years-and-still-going-strong\/\" class=\"et_pb_button et_pb_button_1 et_pb_bg_layout_light\" target=\"_blank\" data-mce-href=\"https:\/\/positive-feedback.com\/audio-discourse\/conrad-johnson-40th-anniversary-art300-monoblock-tube-amplifiers-part-1-forty-years-and-still-going-strong\/\"\u003ePositive Feedback\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_2_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"http:\/\/www.tonepublications.com\/review\/the-conrad-johnson-art-150-power-amplifier\/\" class=\"et_pb_button et_pb_button_2 et_pb_bg_layout_light\" target=\"_blank\" data-mce-href=\"http:\/\/www.tonepublications.com\/review\/the-conrad-johnson-art-150-power-amplifier\/\"\u003eTONE Audio\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_3_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_3_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/07\/Conrad-Johnson-ART300-review-HIFI.pdf\" class=\"et_pb_button et_pb_button_3 et_pb_bg_layout_light\" target=\"_blank\" data-mce-href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/07\/Conrad-Johnson-ART300-review-HIFI.pdf\"\u003eHIFI+\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_4 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eOwner’s Manuals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART150-amplifier-owners-manual-rev0122_2018.pdf\" class=\"et_pb_button et_pb_button_4 et_pb_bg_layout_light\" target=\"_blank\" data-mce-href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART150-amplifier-owners-manual-rev0122_2018.pdf\"\u003eDownload ART150\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!--more--\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":41496911511701,"sku":"13271","price":21000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-ART150-amplifier-e1611691045742_f6f272a0-0467-4033-9d0b-ba5c07c08382.jpg?v=1637357471"},{"product_id":"conrad-johnson-art300-amplifiers","title":"Conrad-Johnson ART300 Amplifiers","description":"\u003cp\u003eConrad-Johnson equipment is one of our first loves in Hi-Fi. The ART150 renews that love, drives my home system, and is the amp I'll be buried with. - Joe Parvey\u003c\/p\u003e\n--\u003cbr\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_0\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/conrad-johnson-ART300-awards.png\" title=\"\" class=\"wp-image-3764\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_0 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eART150 and ART300 amplifiers\u003c\/h1\u003e\n\u003ch4\u003eIn celebration of our 40th anniversary, conrad-johnson has introduced two new ART amplifiers: the ART150 stereo amplifier and ART300 mono-block amplifier.\u003c\/h4\u003e\n\u003cbr\u003eThese amplifiers are designed for our own reference use as well as for industry professionals and dedicated audiophiles. As with previous anniversary products, these amplifiers will be offered as limited editions, with just 250 units of the ART150 and 125 pairs of the ART300 to be sold through selected conrad-johnson dealers and distributors. \u003cbr\u003e\n\u003ch4\u003eThe ART150 and ART300 amplifiers embrace our firm belief that the surest path to both state-of-the-art musicality and exceptional reliability is to keep the circuits simple and build them with the finest available parts.\u003c\/h4\u003e\n\u003cbr\u003eThe audio circuit of these amplifiers has just three elements, each as simple as possible, and each essential to the operation of the amplifier. A voltage gain amplifier (a single triode) is direct-coupled to a cathode coupled phase inverter (each phase handled by a single triode), which in turn drives the output stage. Power is developed by KT150 output tubes, chosen for their musical accuracy, high power, and reliability. A single pair is used for each channel to comfortably and reliably achieve the 150 Watts per channel power rating of the ART150, while two pairs are used to produce 300 Watts in the mono ART300. A small amount (about 12 dB) of loop negative feedback reduces distortion and achieves a sufficiently high damping factor to control reactive loudspeaker systems. To assure continued peak performance, the owner need only make a simple bias adjustment when new tubes are installed. Built in LED bias indicators allow the user to make this adjustment using only the supplied adjustment tool. \u003cbr\u003e\n\u003cblockquote\u003eSeparate, low impedance, discrete dc power supply regulators are provided for the input and phase-inverter stages, thoroughly isolating these stages from the power demands of the output stage. These power supplies are designed to maintain a rock solid supply at all audio frequencies.\u003c\/blockquote\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_1\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg\" title=\"\" class=\"et_pb_lightbox_image\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" srcset=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg 1080w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-300x169.jpg 300w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-768x432.jpg 768w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-1024x576.jpg 1024w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg\" title=\"\" class=\"wp-image-2835\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_1 et_pb_text_align_justified et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch4\u003eThe ART150 and ART300 amplifiers maintain the exacting quality standards for which conrad-johnson is internationally known.\u003c\/h4\u003e\n\u003cbr\u003eResistors are precision laser-trimmed metal foil types. CJD Teflon dielectric capacitors are used for coupling the inverter stage to the output stage, and to bypass the large value polypropylene capacitors in the regulated power supplies. Proprietary wide-bandwidth output transformers contribute to excellent high frequency performance. Even the machined gold plated OFC connectors and the internal wiring have been carefully selected for optimal sonic performance. Attention to every detail enable us to extract the full potential from our circuit designs and ensures that our products will perform to this potential for years to come. The ART150 and ART300 are built without compromise to achieve a new standard in musical performance, and they are built to last.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003eThe Art300 is sold in pairs. \u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_2 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cbr\u003e\n\u003ch5\u003ePower: ART150 Amplifier\u003c\/h5\u003e\n\u003cbr\u003e150 Watts rms per channel from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads) \u003cbr\u003e\n\u003ch5\u003ePower: ART300 Amplifier\u003c\/h5\u003e\n\u003cbr\u003e300 Watts rms from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads) \u003cbr\u003e\n\u003ch5\u003eSensitivity\u003c\/h5\u003e\n\u003cbr\u003e1.0V rms to rated power \u003cbr\u003e\n\u003ch5\u003eFrequency Response (at 10 watts)\u003c\/h5\u003e\n\u003cbr\u003e20 Hz to 20 kHz, +\/- .25 dB \u003cbr\u003e\n\u003ch5\u003eHum and Noise\u003c\/h5\u003e\n\u003cbr\u003e108 dB below rated power \u003cbr\u003e\n\u003ch5\u003eInput Impedance\u003c\/h5\u003e\n\u003cbr\u003e100 kOhms \u003cbr\u003e\n\u003ch5\u003eTube Complement\u003c\/h5\u003e\n\u003cbr\u003eART150 – 3 x 6922, 4 x KT150 \u003cbr\u003eART300 – 2 x 6922, 4 x KT150 \u003cbr\u003e\n\u003ch5\u003eDimensions\u003c\/h5\u003e\n\u003cbr\u003e16.3125D x 19W x 8.75H inches \u003cbr\u003e\n\u003ch5\u003eWeight\u003c\/h5\u003e\n\u003cbr\u003eART150 80 lbs. \u003cbr\u003eART300 73 lbs. \u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003e3-Year Warranty\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cbr\u003eEvery conrad-johnson ART Amplifier is patiently and carefully hand assembled, then individually inspected and its performance verified by an experienced audio technician. \u003cbr\u003e\n\u003cblockquote\u003eThe owner is protected by our three-year limited warranty covering labor and parts except vacuum tubes.\u003c\/blockquote\u003e\n\u003cbr\u003eService is a top priority at conrad-johnson. In the event that a product does require service, it will be handled promptly and efficiently\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_3 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eProduct Reviews\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_0_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/HIFI-Awards-Power-Amplifier-Conrad-Johnson-A300.pdf\" class=\"et_pb_button et_pb_button_0 et_pb_bg_layout_light\" target=\"_blank\"\u003eHIFI+ Amp of the Year\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_1_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/positive-feedback.com\/audio-discourse\/conrad-johnson-40th-anniversary-art300-monoblock-tube-amplifiers-part-1-forty-years-and-still-going-strong\/\" class=\"et_pb_button et_pb_button_1 et_pb_bg_layout_light\" target=\"_blank\"\u003ePositive Feedback\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_2_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"http:\/\/www.tonepublications.com\/review\/the-conrad-johnson-art-150-power-amplifier\/\" class=\"et_pb_button et_pb_button_2 et_pb_bg_layout_light\" target=\"_blank\"\u003eTONE Audio\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_3_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/07\/Conrad-Johnson-ART300-review-HIFI.pdf\" class=\"et_pb_button et_pb_button_3 et_pb_bg_layout_light\" target=\"_blank\"\u003eHIFI+\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_4 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eOwner’s Manuals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_4_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART150-amplifier-owners-manual-rev0122_2018.pdf\" class=\"et_pb_button et_pb_button_4 et_pb_bg_layout_light\" target=\"_blank\"\u003eDownload ART150\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_5_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART300-amplifier-owners-manual-rev_0123_2018.pdf\" class=\"et_pb_button et_pb_button_5 et_pb_bg_layout_light\" target=\"_blank\"\u003eDownload ART300\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003c!--more--\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":41496911544469,"sku":"11187","price":42000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-ART150-amplifier-e1611691045742_361371d4-290b-48f0-a2ea-0dae3cd504ad.jpg?v=1637357473"},{"product_id":"conrad-johnson-classic-62-amplifier","title":"Conrad-Johnson Classic 62SE Amplifier","description":"\u003ch2\u003eClassic 62 Vacuum-Tube\u003cbr\u003eStereo Power Amplifier\u003c\/h2\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_2  et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003ch3\u003eThe conrad-johnson design team is committed to adapting the advances from our state-of-the-art pursuits to more affordable offerings accessible to a wider range of music lovers.\u003c\/h3\u003e\n\u003cp\u003eThis resolve is clearly evident in our new range of Classic amplifiers. Borrowing heavily on the technology of our flagship ART amplifier, the Classic amplifiers preserve the distinctive tonal character of individual instruments and voices, with each clearly located within the overall acoustical environment of the original recording. Musical transients are reproduced with realistic impact, but without artificial enhancement. Like their more costly siblings, the Classic amplifiers capture the emotional impact of the live event, never getting between the listener and the musical performance.\u003c\/p\u003e\n\u003ch3\u003eThere really is no mystery to our chosen path to outstanding musical performance: best results come from simple circuits executed with quality parts.\u003c\/h3\u003e\n\u003cp\u003eThe circuit design for the Classic amplifiers is about as simple as possible, employing just seven vacuum tubes in the Classic Sixty-Two. Single-ended triode voltage gain and inverter stages are coupled to an output stage comprised of a single pair of ultra-linear operated EL34 tubes for each channel. The Classic One-Twenty adds a second pair of output tubes to each channel to achieve twice the output power. Simple but highly effective discrete voltage regulators supply rock-solid stable DC voltage to the critical voltage gain and inverter stages. And speaking of simple, maintenance of the Classic amplifiers could hardly be easier: the owner need only make a simple bias adjustment using the built in bias indicators when installing fresh output tubes.\u003c\/p\u003e\n\u003ch3\u003eThe use of premium quality component parts is the other half of the conrad-johnson recipe for superior musicality.\u003c\/h3\u003e\n\u003cp\u003eIn this area as well, the Classic amplifiers are leaders in their class. Precision, metal-film resistors yield low noise performance for greatest clarity. Polypropylene and polystyrene capacitors, chosen to achieve a high degree of temporal accuracy, are specified for both the audio cir¬cuits and the regulated plate voltage supplies for the input and inverter stages. The result is an exceptional range of dynamics – reproducing both subtle variations in level as well as dramatic loud crescendos. Our proprietary trans-spectral wide-bandwidth output transformers contribute importantly to the extended, “airy” highs that help distinguish the Classic amplifiers from ordinary tube amplifiers.\u003c\/p\u003e\n\u003ch3\u003eThe base model Classic amplifiers offer an ideal introduction to the joys of modern tube amplifiers, while the ease of use, low maintenance costs, and reliability will be a revelation for those who have only experienced “entry-level” tube gear.\u003c\/h3\u003e\n\u003cp\u003eThose who wish to take the experience a step further will want to investigate the upgraded Classic Sixty-Two SE and Classic One-Twenty SE amplifiers. These special edition versions upgrade the output tubes to KT120s and incorporate CJD Teflon Capacitors and ultra high-performance metal foil resistors in strategic applications in the circuit. Any of the Classic amplifier models are sure to rekindle your passion for enjoying great music in your home.\u003c\/p\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cp\u003eClassic Sixty-Two (CL62):\u003c\/p\u003e\n\u003ch5\u003ePower:\u003c\/h5\u003e\n\u003cp\u003eCL62 \u0026amp; 62SE: 60 Watts per channel from 30 Hz to 15 KHz at no more than 1.5 % THD, both channels driven into 4 Ohms (also available connected for 16 ohm loads)\u003c\/p\u003e\n\u003ch5\u003eSensitivity:\u003c\/h5\u003e\n\u003cp\u003eCL62 \u0026amp; 62SE: 0.6 V rms to rated power\u003c\/p\u003e\n\u003ch5\u003eFrequency Response (at 10 Watts):\u003c\/h5\u003e\n\u003cp\u003e20 Hz to 20 kHz, +\/- .3 dB\u003c\/p\u003e\n\u003ch5\u003eHum and Noise:\u003c\/h5\u003e\n\u003cp\u003e96 dB below rated power\u003c\/p\u003e\n\u003ch5\u003ePhase:\u003c\/h5\u003e\n\u003cp\u003ephase correct\u003c\/p\u003e\n\u003ch5\u003eInput Impedance:\u003c\/h5\u003e\n\u003cp\u003e100 kOhms\u003c\/p\u003e\n\u003ch5\u003eTube Complement:\u003c\/h5\u003e\n\u003cp\u003eCL62: 3 x 6922, 4 x EL34\u003c\/p\u003e\n\u003cp\u003eCL62SE: 3 x 6922, 4 x KT120\u003c\/p\u003e\n\u003ch5\u003eDimensions:\u003c\/h5\u003e\n\u003cp\u003eCL62 \u0026amp; 62SE: 13.375D x 17.375W x 6.625H inches\u003c\/p\u003e\n\u003ch5\u003eWeight:\u003c\/h5\u003e\n\u003cp\u003eCL62 \u0026amp; 62SE: 44 lb. net\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003e3-Year Warranty\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eEvery conrad-johnson Classic Amplifier is patiently and carefully hand assembled, then individually inspected and its performance verified by an experienced audio technician.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eThe owner is protected by our three year limited warranty covering labor and parts except vacuum-tubes.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp\u003eService is a top priority at conrad-johnson. In the event that a product does require service, it will be handled promptly and efficiently.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":41496911610005,"sku":"11179","price":7500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-Classic62-beauty-with-cage-1080-16-9-1.jpg?v=1637357459"},{"product_id":"conrad-johnson-classic-120-amplifier","title":"Conrad-Johnson Classic 120SE Amplifier","description":"\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\u003cbr\u003e--\u003cbr\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003eThe conrad-johnson design team is committed to adapting the advances from our state-of-the-art pursuits to more affordable offerings accessible to a wider range of music lovers.\u003c\/h3\u003e\n\u003cbr\u003eThis resolve is clearly evident in our new range of Classic amplifiers. Borrowing heavily on the technology of our flagship ART amplifier, the Classic amplifiers preserve the distinctive tonal character of individual instruments and voices, with each clearly located within the overall acoustical environment of the original recording. Musical transients are reproduced with realistic impact, but without artificial enhancement. Like their more costly siblings, the Classic amplifiers capture the emotional impact of the live event, never getting between the listener and the musical performance.\n\u003cbr\u003e\u003ch3\u003eThere really is no mystery to our chosen path to outstanding musical performance: best results come from simple circuits executed with quality parts.\u003c\/h3\u003e\n\u003cbr\u003eThe circuit design for the Classic amplifiers is about as simple as possible, employing just seven vacuum tubes in the Classic Sixty-Two. Single-ended triode voltage gain and inverter stages are coupled to an output stage comprised of a single pair of ultra-linear operated EL34 tubes for each channel. The Classic One-Twenty adds a second pair of output tubes to each channel to achieve twice the output power. Simple but highly effective discrete voltage regulators supply rock-solid stable DC voltage to the critical voltage gain and inverter stages. And speaking of simple, maintenance of the Classic amplifiers could hardly be easier: the owner need only make a simple bias adjustment using the built in bias indicators when installing fresh output tubes.\n\u003cbr\u003e\u003ch3\u003eThe use of premium quality component parts is the other half of the conrad-johnson recipe for superior musicality.\u003c\/h3\u003e\n\u003cbr\u003eIn this area as well, the Classic amplifiers are leaders in their class. Precision, metal-film resistors yield low noise performance for greatest clarity. Polypropylene and polystyrene capacitors, chosen to achieve a high degree of temporal accuracy, are specified for both the audio cir¬cuits and the regulated plate voltage supplies for the input and inverter stages. The result is an exceptional range of dynamics – reproducing both subtle variations in level as well as dramatic loud crescendos. Our proprietary trans-spectral wide-bandwidth output transformers contribute importantly to the extended, “airy” highs that help distinguish the Classic amplifiers from ordinary tube amplifiers.\n\u003cbr\u003e\u003ch3\u003eThe base model Classic amplifiers offer an ideal introduction to the joys of modern tube amplifiers, while the ease of use, low maintenance costs, and reliability will be a revelation for those who have only experienced “entry-level” tube gear.\u003c\/h3\u003e\n\u003cbr\u003eThose who wish to take the experience a step further will want to investigate the upgraded Classic Sixty-Two SE and Classic One-Twenty SE amplifiers. These special edition versions upgrade the output tubes to KT120s and incorporate CJD Teflon Capacitors and ultra high-performance metal foil resistors in strategic applications in the circuit. Any of the Classic amplifier models are sure to rekindle your passion for enjoying great music in your home.\n\n\u003cp\u003eCL120 \u0026amp;120SE: 125 Watts per channel from 30 Hz to 15 KHz at no more than 1.5 % THD, both channels driven into 4 Ohms (also available connected for 8 or 16 Ohm loads)\u003c\/p\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":41496911642773,"sku":"12738","price":13500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-Classic-120-beauty-with-cage-1080-16-9__32409.1531370825.1280.1280.jpg?v=1637357505"},{"product_id":"conrad-johnson-hva1-headphone-amp","title":"CONRAD-JOHNSON  HVA1 HEADPHONE AMP","description":"\u003cp\u003eCONRAD-JOHNSON HVA1 HEADPHONE AMP\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe HVA1 accommodates two line-level inputs. Power output is 3 Watts into 20 Ohms. The enhanced triode circuit (similar to that introduced in our flagship GAT preamplifier) employs two 6922 vacuum-tubes (one for each channel) for voltage gain coupled to a high-current FET buffer stage (source follower). Each of the two channels is powered by its own independent DC regulator. CJD Teflon capacitors and Vishay resistors are featured in the circuits. The level control is a discrete stepped attenuator constructed entirely with Vishay resistors. The circuitry is housed in a heavy, elegant aluminum chassis dressed with anodized brushed aluminum panels on front, sides, and top.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/3B687DE1-C21D-4AD0-AB4F-80CDBDA9E5A9_4_5005_c_480x480.jpg?v=1647547702\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eHVA1 Headphone Amplifier\u003c\/h3\u003e\n\u003ch5\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003ePower: 3 watts per channel RMS both channels driven into 20 ohms from 30Hz to 15KHz at no more than 2.5% total harmonic distortion or inter-modulation distortion.\u003c\/li\u003e\n\u003cli\u003eGain: 14DB\u003c\/li\u003e\n\u003cli\u003eSensitivity: 1.4 V rms to rated power\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 20Hz to 20kHz +0\/-.3 dB\u003c\/li\u003e\n\u003cli\u003eHum and Noise: \u0026lt;200 UV below 100mw\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 12k ohms\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 20-47 ohms\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":41496913313941,"sku":"12231","price":7500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-HVA-1-headphone-amplifier-beauty-2.jpg?v=1637357503"},{"product_id":"phasemation-ma-1500-mono-tube-amplifier-pair","title":"Phasemation MA-1500 Mono Tube Amplifier (Pair)","description":"\u003ch2 data-mce-fragment=\"1\" class=\"product-title\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eMonaural Power Amplifiter \u003c\/span\u003eMA-1500\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e300B Single-Ended Tube Monaural Power Amplifier which can educe the music reality and even the artist's passion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIn the world of audio amplifiers, wide kinds of semiconductor amplifiers, tube amplifiers, etc. are released. Therefore, the respective audio features can be enjoyed as a hobby.　Especially the tube power amplifiers has a tube called \"fine tube\" having a reputation for sound quality and last year we have developed the monaural power amplifier, MA-2000 composed by a parallel single-ended circuit adopting 300B which is the best tube among them and a circuit strongly driven by a transformer-coupled circuit adopting 2A3.\"\u003c\/p\u003e\n\u003cp\u003eThis year to tell many people the significance of MA-2000, we developed a new monaural power amplifier MA-1500 which has a plentiful 10W output along with an operation due to the transformer-coupled circuit which is single-operating with a 300B single tube.\u003c\/p\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3\u003eMain feature\u003c\/h3\u003e\n\u003carticle\u003e\n\u003ch4\u003eToshiba 6CG7 for the transformer-coupled circuit driving PSVAN 300B ended-tube optimally\u003c\/h4\u003e\n\u003cp\u003eLetting the ended-tube PSVAN 300B to be the self-bias single pure A-class, the Toshiba 6CG7 as a driver is used on the transformer-couple and operates the speakers with stability having no wobbling but is structured to exert the excellence of 300B's original quality with the simplest operation.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eComposing the non-feedback amplifier by adopting triode tubes in all stages\u003c\/h4\u003e\n\u003cp\u003eWe compose the non-feedback amplifier by adopting triode tubes, 5814A+6CG7+300B, in all stages. Therefore, the ability for reproducing dynamic and very expressive music is provided only possible from the non-feedback circuit.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eAdopting the output transformer and inter-stage transformer made by LUNDAHL in Sweden\u003c\/h4\u003e\n\u003cp\u003eBecause the inter-stage and output transformers made by LUNDAHL in Sweden are proper to compose this equipment and suited for the sound quality to be aimed by us, we have adopted them.　We adopted parallel connection by utilizing the independent winding structure at the secondary side of the inter-stage transformer and therefore secured a sure transmission to the level of very small signals. The independent terminals able to drive an 8 or 4 ohm speaker are provided by utilizing the independent winding structure at the secondary side of the output transformer.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eComposed of two independent power choke transformers\u003c\/h4\u003e\n\u003cp\u003eBecause the power supplies from the independent power choke transformer are individually supplied for the first stage, the driver stage (5814A+6CG7), and the power stage (300B single-ended), the mutual interference between the input signal amplifier circuit and the speaker drive circuit is purged. Therefore, signals of various levels from infinitesimal signals to high power signals are amplified clearly.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eThoroughgoing design for decreasing the noise\u003c\/h4\u003e\n\u003cp\u003eWe have adopted the thoroughgoing design for decreasing the noise with the follows:\u003c\/p\u003e\n\u003cul class=\"ul01\"\u003e\n\u003cli\u003eRectifier tube 5R4G which does not generate a switching noise in principle against a high voltage power supply\u003c\/li\u003e\n\u003cli\u003eRectifier circuits composing of choke transformers\u003c\/li\u003e\n\u003cli\u003e300B heaters directly driven by DC power supplies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003cbr\u003e\u003c\/article\u003e\n\u003carticle\u003e\u003cimg src=\"https:\/\/www.phasemation.com\/img\/product\/ma-1500\/photo01.png\"\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3\u003eProduct Specification\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e300B Single-Ended Monaural Power Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput impedance\u003c\/td\u003e\n\u003ctd\u003e47k ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e26dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidual noise\u003c\/td\u003e\n\u003ctd\u003e200µV or less : A-NET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated output\u003c\/td\u003e\n\u003ctd\u003e10W or more　(THD：5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency characteristics\u003c\/td\u003e\n\u003ctd\u003e10 - 40kHz (+0,-3dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd\u003e4 ohms,　8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e100W (100VAC　50～60Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal dimensions (mm)\u003c\/td\u003e\n\u003ctd\u003e245 (W)×226(H)×427(D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e16ｋｇ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessories\u003c\/td\u003e\n\u003ctd\u003eAC power cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Phasemation","offers":[{"title":"Default Title","offer_id":42312394375317,"sku":"10555","price":23975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/ma1500.png?v=1653165456"},{"product_id":"phasemation-ma-2000-mono-tube-amplifier-pair","title":"Phasemation MA-2000 Mono Tube Amplifier (Pair)","description":"\u003ch2 class=\"product-title\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eMonaural Power Amplifiter \u003c\/span\u003eMA-2000\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e300B Parallel Single-ended Tube Monaural Power Amplifier which can educe the music reality and even the artist's passion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn the world of audio amplifiers, the wide kinds of semiconductor amplifiers, tube amplifiers, etc. are released. Therefore, the respective audio features can be enjoyed as a hobby.　Especially tube power amplifiers adopting a tube called 'fine tube' such as 2A3 or 300B have well-established sound quality that cannot be expressed by semiconductor amplifiers and they are accepted consistently even in the modern era.　\"We would like to taste the best sound produced by a 300B amplifier composed by a parallel single-ended circuit adopting 300B which is the best tube among them and a circuit strongly driven by a transformer-coupled circuit adopting 2A3.\" In 2016, we have developed the monaural power amplifier, MA-2000, to respond to the user's thoughts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3\u003eMain feature\u003c\/h3\u003e\n\u003carticle\u003e\n\u003ch4\u003e300B parallel single-ended stage for fixed-bias single pure class-A operation\u003c\/h4\u003e\n\u003cp\u003eIn order to compose the single pure class-A circuit so that the innate goodness of 300B is expressed with the simplest operation, two fixed bias power supplies are allocated individually for the ended-tube of PSVANE WE300B and therefore the setup of the optimum operating point and stable operation are secured. Consequently, this strong power greater than 25W outputted by a parallel operation can be supplied for driving a speaker. By adding the power supply system having a timer control (for 1 minute) at the time of turning the power supply on, the operation with further high reliability is achieved.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eSOVTEK 2A3 for the transformer-coupled circuit driving PSVANE WE300B ended-tube optimally\u003c\/h4\u003e\n\u003cp\u003eWe utilize 2A3 which is well-established even as an ended tube for a transformer–coupled circuit to drive the ended tube 300B, set 2A3 to the optimum operating point, and secure the DC stability by supplying the individual fixed bias to 300B parallel circuits. Therefore, the speaker is driven with unshakable stability.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eComposing the non-feedback amplifier by adopting triode tubes in all stages\u003c\/h4\u003e\n\u003cp\u003eWe compose the non-feedback amplifier by adopting triode tubes, 12AX7SRPP+2A3+300B, in all stages. Therefore, the ability for reproducing dynamic and very expressive music is provided only possible from the non-feedback circuit.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eAdopting the output transformer and inter-stage transformer made by LUNDAHL in Sweden\u003c\/h4\u003e\n\u003cp\u003eBecause the inter-stage and output transformers made by LUNDAHL in Sweden are proper to compose this equipment and suited for the sound quality to be aimed by us, we have adopted them.　The fixed bias circuits are allocated individually for the ended-tube of 300B with utilizing the independent winding structure at the secondary side of the inter-stage transformer and therefore the setup of the optimum operating point and stable operation are secured by reading the meter directly.　The independent terminals able to drive an 8 or 4 ohm speaker are provided by utilizing the independent winding structure at the secondary side of the output transformer.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eComposed of two independent power choke transformers\u003c\/h4\u003e\n\u003cp\u003eBecause the power supplies from the independent power choke transformer are individually supplied for the driver stage (2A3) and power stage (300B parallel single-ended), the mutual interference between the input signal amplifier circuit and the speaker drive circuit is purged. Therefore, signals of various levels from infinitesimal signals to high power signals are amplified clearly.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eThoroughgoing design for decreasing the noise\u003c\/h4\u003e\n\u003cp\u003eWe have adopted the thoroughgoing design for decreasing the noise as follows:\u003cbr\u003e-Rectifier tube 5R4G which does not generate a switching noise in principle against a high voltage\u003cbr\u003epower supply\u003cbr\u003e-Rectifier circuits composing of choke transformers\u003cbr\u003e-DC ignition for heaters driven by complete DC power supplies for all tubes.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eTimer indicator and appearance\u003c\/h4\u003e\n\u003cp\u003eThe color of the timer indicator is red at the time of standby and changes to blue after 1 minute as a starting time. In addition, the impressive front glass with placing the two-color LED indicator on the front panel is designed as a stately appearance.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eMA-2000 Block diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.phasemation.com\/img\/product\/ma-2000\/diagram.jpg\"\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.phasemation.com\/img\/product\/ma-2000\/photo01.png\"\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3\u003eProduct Specification\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e300B Parallel Single-ended Monaural Power Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput impedance\u003c\/td\u003e\n\u003ctd\u003e47k ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e27dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidual noise\u003c\/td\u003e\n\u003ctd\u003e200µV or less: A-NET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated output\u003c\/td\u003e\n\u003ctd\u003e25W (THD: 5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency characteristics\u003c\/td\u003e\n\u003ctd\u003e10Hz to 40kHz (+0,–3dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd\u003e4 ohms, 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e160W（230VAC, 50 to 60Hz）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\/Output terminals\u003c\/td\u003e\n\u003ctd\u003eTerminals made by FURUTECH CO.,LTD.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal dimensions (mm)\u003c\/td\u003e\n\u003ctd\u003e270（W） x 245（H） x 433（D）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e20ｋｇ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessories\u003c\/td\u003e\n\u003ctd\u003eAC power cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Phasemation","offers":[{"title":"Default Title","offer_id":42312405909653,"sku":"10060","price":35975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/ma2000.png?v=1653165605"},{"product_id":"reference-160s","title":"Audio Research Reference 160S Stereo Amplifier","description":"\u003c!-- Hero Section --\u003e\n\u003cdiv class=\"product-hero\" style=\"margin:0; padding:0;\"\u003e\n  \u003cdiv class=\"hero-inner\" style=\"position: relative; margin:0; padding:0; overflow:hidden;\"\u003e\n    \u003cimg class=\"hero-image\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/160S-HD.webp?v=1761645717\" alt=\"Reference 160S Stereo Amplifier\" style=\"width:100%; height:auto; display:block; margin:0; padding:0;\"\u003e\n    \n    \u003c!-- Text on image --\u003e\n    \u003cdiv class=\"hero-text\" style=\"position:absolute; bottom:60px; right:100px; text-align:right;\"\u003e\n      \u003ch1 class=\"title\" style=\"margin:0 0 10px 0; font-size:60px; font-weight:400; color:#d9caa7; letter-spacing:1px;\"\u003e\n        Reference 160S\n      \u003c\/h1\u003e\n      \u003cp class=\"subtitle\" style=\"margin:0; font-size:20px; text-transform:uppercase; color:#ffffff; letter-spacing:2px; opacity:0.9;\"\u003e\n        Stereo Power Amplifier\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Second Section --\u003e\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#ffffff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref-160S-4.webp?v=1761645717\" alt=\"Reference 160S Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n    \n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003cp style=\"font-size:17px; color:#000000; line-height:1.8; margin:0;\"\u003e\n       The Reference 160S stereo power amplifier follows in the footsteps of the internationally acclaimed REF160M monoblock power amplifier, which has won multiple amplifier-of the-year honors from publications such as Stereophile, Hi-Fi+, and others.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref160S-midpage.webp?v=1761645718\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#000000; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n\u003ch2 style=\"font-size:32px; color:#b7a06a; font-weight:400; margin-bottom:20px;\"\u003e\n        GhostMeters™\n      \u003c\/h2\u003e\n      \u003cp style=\"font-size:18px; color:#ffffff; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n        REF160S carries-over the stunning look of the 160M, with dual GhostMeters™ that float in front of the eight KT150 output power tubes.\n      \u003c\/p\u003e\n      \u003cp style=\"font-size:17px; color:#ffffff; line-height:1.8; margin:0;\"\u003e\n       Also continued is the the feature set introduced in the 160M, including a proprietary auto-bias circuit, switchable Triode or Ultralinear modes of operation, balanced and single-ended inputs, and an output tube monitoring mode. The 160S also uses a four-layer circuit board, allowing music to emanate from a jet-black background.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref160S-8.webp?v=1761645717\" alt=\"Reference 160S Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#ffffff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n   \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref160S-3jpg.webp?v=1761645717\" alt=\"Reference 160S Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n\n      \u003cp style=\"font-size:17px; color:#000000; line-height:1.8; margin:0;\"\u003e\n       With a weight of 100 lbs. the REF160S distills the astonishing resolution, dynamic impact, musical purity and finesse of the 160M into one beautiful and attainable chassis. It was designed for the music lover in all of us.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n   \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref160S-midpage2.webp?v=1761645717\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref160M-S-system.webp?v=1761645717\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Line-elevations-160S.webp?v=1761645716\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\n  \u003cdiv style=\"max-width: 1000px; margin: 60px auto; font-family: Arial, sans-serif; text-align: center; color: #333;\"\u003e\n  \u003ch2 style=\"font-size: 20px; font-weight: 500; margin-bottom: 25px; letter-spacing: 1px;\"\u003e\n    TECHNICAL SPECIFICATIONS\n  \u003c\/h2\u003e\n\n  \u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 16px;\"\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003ePower Output\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e140 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 140 watts, below 0.04% at 1 watt. (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not critical)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003ePower Bandwidth\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e(-3dB Points) 5Hz to 70kHz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003eFrequency Response\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e(-3dB points at 1 watt) 0.5Hz to 110kHz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eInput Sensitivity\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e2.4V RMS Balanced for rated output. (25.5 dB gain into 8 ohms)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eInput Impedance\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e300k ohms Balanced; 100k ohms Single-ended\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Polarity\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eNon-inverting. Balanced input pin 2+ (IEC-268)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Taps\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e4, 8, 16 ohms\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Regulation\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eApproximately 0.6dB 16 OHM LOAD TO OPEN CIRCUIT (Damping factor approximately 14)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOverall Negative Feedback\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e14dB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eSlew Rate\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e13 volts\/microsecond\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eRise Time\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e2.0 microseconds\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003ePower Requirements\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e105-130VAC 60Hz (210-250VAC 50Hz) 875 watts at rated output, 700 watts in Triode mode, 500 watts at “idle”, 3.6 watts off\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eTubes Required\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e4 matched pair KT150 (Power output V1-4); 4 6H30 (Gain stage V5 and V6)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eWeight\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e100lbs\u003c\/td\u003e\n    \u003c\/tr\u003e\n   \n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eDimensions\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eWidth  19.0” (48.26 cm)\u003cbr\u003e\nHeight 10.25” (26 cm)\u003cbr\u003e\nDepth  21.5” (54,61 cm)\u003cbr\u003e\nWith Handles and Connectors: 24” (60.96 cm)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n","brand":"Audio Research Corporation","offers":[{"title":"Silver","offer_id":43320363614357,"sku":"13610","price":28000.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43320363647125,"sku":"13611","price":28000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/Product-REF-160s-front_jpg.webp?v=1679421004"},{"product_id":"reference-6-se","title":"Audio Research Reference 6SE Line-Stage","description":"\u003c!-- Hero Section --\u003e\n\u003cdiv class=\"product-hero\" style=\"margin:0; padding:0;\"\u003e\n  \u003cdiv class=\"hero-inner\" style=\"position: relative; margin:0; padding:0; overflow:hidden;\"\u003e\n    \u003cimg class=\"hero-image\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref6-HD-1.webp?v=1761638389\" alt=\"Reference 6SE Line-Stage\" style=\"width:100%; height:auto; display:block; margin:0; padding:0;\"\u003e\n    \n    \u003c!-- Text on image --\u003e\n    \u003cdiv class=\"hero-text\" style=\"position:absolute; bottom:60px; right:100px; text-align:right;\"\u003e\n      \u003ch1 class=\"title\" style=\"margin:0 0 10px 0; font-size:45px; font-weight:400; color:#d9caa7; letter-spacing:1px;\"\u003e\n        Reference 6SE Line-Stage\n      \u003c\/h1\u003e\n      \u003cp class=\"subtitle\" style=\"margin:0; font-size:20px; text-transform:uppercase; color:#ffffff; letter-spacing:2px; opacity:0.9;\"\u003e\n        Preamplifier\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Second Section --\u003e\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#fff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n    \n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003cp style=\"font-size:18px; color:#555; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n        Discover why Audio Research enjoys a long tradition of producing the finest preamplifiers in the world.\n      \u003c\/p\u003e\n      \u003cp style=\"font-size:17px; color:#555; line-height:1.8; margin:0;\"\u003e\n        In 1973, the SP3 was hailed by every major critic as the best preamplifier available, and this pursuit has continued ever since. The Reference Series from Audio Research was first introduced in 1995 and has been the ultimate expression of performance, musicality and dynamics.\n      \u003c\/p\u003e\n\n    \u003cp style=\"font-size:18px; color:#555; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n        Reference preamps have awakened countless listeners to the irreplaceable contribution of a great preamp to a system’s final performance. The Reference 6SE is the latest chapter in our story.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ref6-1.webp?v=1761638390\" alt=\"Reference 6SE Line-Stage\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#000000; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003ch2 style=\"font-size:32px; color:#b7a06a; font-weight:400; margin-bottom:20px;\"\u003e\n        The Reference 6SE delivers the highest performance ever available in a single-chassis preamplifier.\n      \u003c\/h2\u003e\n      \u003cp style=\"font-size:17px; color:#ffffff; line-height:1.8; margin:0;\"\u003e\n       Benefitting from research that went into the Reference 160-series amplifiers, and the Reference 750SEL amplifier, the 6SE incorporates a myriad of new components that have been judiciously incorporated into its design.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref6SE-black.webp?v=1761638391\" alt=\"Reference 6SE Line-Stage\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ref6-system2.webp?v=1761638398\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n  \n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#000000; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003cp style=\"font-size:18px; color:#ffffff; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n       With a single gain stage, the 6SE is a fully-balanced, Class-A design with zero feedback.\n      \u003c\/p\u003e\n      \u003cp style=\"font-size:17px; color:#555; line-height:1.8; margin:0; color:#ffffff;\"\u003e\n       In addition to six long-life 6H30 tubes in the gain stage, the enormous and highly-regulated power supply has another 6H30 with a 6550, typically found as an output tube in a power amplifier, providing vacuum-tube regulation.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref-6-inside.webp?v=1761638392\" alt=\"Reference 6SE Line-Stage\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref6-midpage.webp?v=1761638398\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#ffffff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003cp style=\"font-size:17px; color:#555; line-height:1.8; margin:0; color:#000000;\"\u003e\n       The 6SE stands on the shoulders of prior Reference preamplifiers and the latest ARC power amplifiers from which innovations were taken. As such, it forms the foundational circuit for other preamplification products such as the Reference Phono 3SE.\u003cbr\u003e\u003cbr\u003e\nRegardless of the recording, in stepping up into a Reference preamplifier, the sonic gains are immediate and compelling. Effortless, dynamic, and dimensional. The speed and resolution merge with musical color and textures that are both accurate and captivating.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref-6-back.webp?v=1761638390\" alt=\"Reference 6SE Line-Stage\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n  \u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#ffffff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ref6-system.webp?v=1761638395\" alt=\"Reference 6SE Line-Stage\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003cp style=\"font-size:17px; color:#555; line-height:1.8; margin:0; color:#000000;\"\u003e\n       Low bass extension and heft from the 6SE reveal just how much bottom end reach is left to be desired in lesser designs. New 6SE owners revel in the potential that can now be tapped in their existing power amplifier’s and loudspeaker’s performance.\n      \u003c\/p\u003e\n      \u003cp style=\"font-size:18px; color:#000000; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n       Hear for yourself why so many listeners consider the Reference 6SE to be the indispensable core of a world-class performance audio system.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n  \n\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ref6-ref160Msystem5-1.webp?v=1761638396\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\n  \u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Line-elevations-LS6-1.webp?v=1761638387\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\n  \u003cdiv style=\"max-width: 1000px; margin: 60px auto; font-family: Arial, sans-serif; text-align: center; color: #333;\"\u003e\n  \u003ch2 style=\"font-size: 20px; font-weight: 500; margin-bottom: 25px; letter-spacing: 1px;\"\u003e\n    TECHNICAL SPECIFICATIONS\n  \u003c\/h2\u003e\n\n  \u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 16px;\"\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003eFrequency Response\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e+0-3dB, 0.4Hz to 200kHz at rated output\n(Balanced, 200k ohms load)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eDistortion\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eLess than .01% at 2V RMS BAL output\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eGain\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eMain output: 12dB Balanced output, 6dB SE output\u003cbr\u003e\nRecord out: 0dB (Processor input: 0dB BAL output)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eInput Impedance\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e120K ohms Balanced, 60K ohms SE\u003cbr\u003e\nInputs: 4 balanced, 4 single-ended\u003cbr\u003e\nAssignable processor passthrough\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Impedance\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e600 ohms Balanced, 300 ohms SE Main (2)\u003cbr\u003e\n20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 main, 1 record out (XLR and RCA connectors).\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Polarity\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eNon-inverting\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eMaximum Input\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e18V RMS BAL, 9V RMS SE\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eRated Outputs\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e2V RMS (1V RMS SE) into 200K ohm balanced load (maximum balanced output capability is 70V RMS at less than 0.5% THD at 1kHz)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eCrosstalk\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e-88dB or better at 1kHz and 10 kHz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eControls\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eRotary encoders: Volume (103 steps), Select Input.\u003cbr\u003e\nPush Buttons:  Power, Menu, Enter, Mono, Invert, Mute\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003ePower Supplies\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eElectronically regulated low and high voltage supplies.  Automatic 45 sec. warm-up\/ brown-out mute. Line regulation better than .01%.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eNoise\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e1.7uV RMS residual IHF weighted balanced equivalent input noise with volume at 1 (109dB below 2V RMS output.)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eTube Complement\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e(6)-6H30P dual triodes, plus (1 each) 6550WE\nand 6H30P in power supply\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003ePower Requirements\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e100-135VAC 60Hz (200-250VAC 50\/60Hz) 130 watts.  Standby: 2 watts.\u003c\/td\u003e\n    \u003c\/tr\u003e\n   \n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eDimensions\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eWidth: 19” (48 cm)\u003cbr\u003e\nHeight: 7.8” (19.8 cm)\u003cbr\u003e\nDepth: 16.5” (41.9 cm)\u003cbr\u003e\nHandles extend 1.6” (4 cm) forward of the front panel.\u003cbr\u003e\nWeight: 37.5 lbs. (17 kg) Net; 49 lbs. (22.3 kg) Shipping\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n","brand":"Audio Research Corporation","offers":[{"title":"Silver","offer_id":43320363679893,"sku":"13604","price":22500.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43320363712661,"sku":"13605","price":22500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/Product-Ref-6-Front_jpg.webp?v=1679421236"},{"product_id":"vt-80se","title":"Audio Research VT80 SE Stereo Amplifier","description":"\u003c!-- Hero Section --\u003e\n\u003cdiv class=\"product-hero\" style=\"margin:0; padding:0;\"\u003e\n  \u003cdiv class=\"hero-inner\" style=\"position: relative; margin:0; padding:0; overflow:hidden;\"\u003e\n    \u003cimg class=\"hero-image\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/VT80SE-HD-Mobile2.webp?v=1761647982\" alt=\"VT80 SE Stereo Amplifier\" style=\"width:100%; height:auto; display:block; margin:0; padding:0;\"\u003e\n    \n    \u003c!-- Text on image --\u003e\n    \u003cdiv class=\"hero-text\" style=\"position:absolute; bottom:60px; right:100px; text-align:right;\"\u003e\n      \u003ch1 class=\"title\" style=\"margin:0 0 10px 0; font-size:60px; font-weight:400; color:#d9caa7; letter-spacing:1px;\"\u003e\n        VT80 SE\n      \u003c\/h1\u003e\n      \u003cp class=\"subtitle\" style=\"margin:0; font-size:20px; text-transform:uppercase; color:#ffffff; letter-spacing:2px; opacity:0.9;\"\u003e\n        Stereo Amplifier\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Second Section --\u003e\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#ffffff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n    \n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n      \u003cp style=\"font-size:18px; color:#000000; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n        The VT80SE was created as a flexible, great-sounding amplifier that is easy to enjoy and easy to live with, every day. A direct descendant of our Reference amplifiers that borrows from their acclaimed designs and using many of their parts, the VT80SE sounds like a much larger amplifier with impressive dynamics, control, and resolution.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/VT80SE-6.webp?v=1761647984\" alt=\"VT80 SE Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#000000; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Ref160S-8.webp?v=1761645717\" alt=\"VT80 SE Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n\u003ch2 style=\"font-size:32px; color:#b7a06a; font-weight:400; margin-bottom:20px;\"\u003e\n        A fully-balanced design\n      \u003c\/h2\u003e\n      \u003cp style=\"font-size:17px; color:#ffffff; line-height:1.8; margin:0;\"\u003e\n       A fully-balanced design that uses only two pairs of KT150 output tubes, it can be connected via balanced or single-ended inputs. Operation is carefree; simply drop in the tubes and the VT80SE’s proprietary circuit automatically adjusts for tube wear or powerline fluctuations in real time, making the occasional bias adjustment a thing of the past.\u003cbr\u003e\u003cbr\u003e\nIt also works with other common output tubes like the 6550, KT88 or the KT120. Each output tube is fused, so there are no worries, all you have to do is turn it on and enjoy the music.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#000000; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n\n       \u003cp style=\"font-size:18px; color:#ffffff; font-weight:600; margin-bottom:20px; line-height:1.6;\"\u003e\n        The VT80SE will be a revelation in your system. Its natural clarity, coupled to its intoxicating tonal palette and sheer dynamic swing, will bring your music to life.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n   \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/VT80SE-4.webp?v=1761647985\" alt=\"VT80 SE Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n  \u003cdiv style=\"display:flex; justify-content:center; width:100%; background-color:#ffffff; padding:0; margin:0;\"\u003e\n  \u003cdiv style=\"display:flex; flex-wrap:wrap; align-items:center; max-width:1600px; width:100%; margin:0 auto;\"\u003e\n\n    \u003cdiv style=\"flex:1 1 50%; padding:40px; box-sizing:border-box;\"\u003e\n\n       \u003cp style=\"font-size:17px; color:#000000; line-height:1.8; margin:0;\"\u003e\n      After more than 50 years, our focus remains the advancement of the state-of-the-art in music reproduction. Every component is meticulously hand-crafted and personally auditioned before it leaves our Minnesota facility.\u003cbr\u003e\u003cbr\u003e\nOur attention to detail, customer service, and product support create unprecedented value. An Audio Research component is more than a purchase, it is an investment.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n   \u003cdiv style=\"flex:1 1 50%; padding:0; box-sizing:border-box;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/VT80SE-3.webp?v=1761647985\" alt=\"VT80 SE Stereo Amplifier\" style=\"width:100%; height:auto; display:block; border-radius:0; margin:0; padding:0;\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/VT80SE-system-2048x1433.webp?v=1761647985\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"\n  max-width:1600px;   \/* Giới hạn chiều rộng tối đa *\/\n  margin:0 auto;      \/* Căn giữa hình *\/\n  overflow:hidden;    \/* Ẩn phần vượt khung (nếu có) *\/\n  background-color:#000; \/* Tuỳ chọn: nền đen để làm nổi hình *\/\n\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Line-elevations-VT80.webp?v=1761647981\" alt=\"Product Banner\" style=\"\n      width:100%;         \/* Cho hình tự giãn đầy khung *\/\n      height:auto;        \/* Giữ tỉ lệ hình *\/\n      display:block;      \/* Loại bỏ khoảng trắng dưới ảnh *\/\n    \"\u003e\n\u003c\/div\u003e\n\n  \u003cdiv style=\"max-width: 1000px; margin: 60px auto; font-family: Arial, sans-serif; text-align: center; color: #333;\"\u003e\n  \u003ch2 style=\"font-size: 20px; font-weight: 500; margin-bottom: 25px; letter-spacing: 1px;\"\u003e\n    TECHNICAL SPECIFICATIONS\n  \u003c\/h2\u003e\n\n  \u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 16px;\"\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003ePower Output\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e75 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 75 watts, below 0.05% at 1 watt. (Note that actual power output is dependent upon both line voltage and ‘condition’ i. e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003ePower Bandwidth\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e(-3dB points) 7Hz to 60kHz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right; width: 45%;\"\u003eFrequency Response\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e(-3dB points at 1 watt) 0.7Hz to 80kHz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eInput Sensitivity\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e1.4V RMS BAL for rated output. (25dB Bal gain into 8 ohms.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eInput Impedance\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e300K ohms Balanced (150K ohms SE)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Impedance\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eNon-inverting. Balanced input pin 2+ (IEC-268)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Taps\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e8 ohms, 4 ohms\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOutput Regulation\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eApproximately 1.0dB 8 OHM LOAD TO OPEN CIRCUIT (Damping factor approximately 8)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eOverall Negative Feedback\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e15dB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eSlew Rate\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e10 volts\/microsecond\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eRise Time\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e4.0 microseconds \u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eChannel Separation\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e112dB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eHum \u0026amp; Noise\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e–84dBV weighted, 8 ohms tap\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eSignal to Noise\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e112dB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eControl\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003ePower on\/off, auto shut-off on\/defeat, Input BAL\/SE, RS232, 12V trigger\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eAmbient Air Temperature\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e30° C (86° F) maximum ambient air temperature\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003ePower Supply Energy Storage\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003eApproximately 350 joules\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003ePower Requirements\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e100-125VAC 60Hz (200-250VAC 50Hz) 410 watts at rated output, 500 watts maximum, 230 watts idle. Sleep power \u0026lt; 1 watt\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eTubes Required\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e2 – Matched pair KT150 – Power Output; 2 – 6H30 Driver\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eWeight\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003e45.7lbs. (20.7 kg) Net; 60.5 lbs. (27.4 kg)\u003c\/td\u003e\n    \u003c\/tr\u003e\n   \n    \u003ctr\u003e\n      \u003ctd style=\"font-weight: 600; padding: 12px 20px; text-align: right;\"\u003eDimensions\u003c\/td\u003e\n      \u003ctd style=\"padding: 12px 20px; text-align: left;\"\u003ewidth: 19” (48.3 cm)\u003cbr\u003e\nheight: 10.33” (26.2 cm)\u003cbr\u003e\ndepth: 18.45” (46.8 cm) to chassis , 19.40” (49.3 cm) to terminals\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n","brand":"Audio Research Corporation","offers":[{"title":"Silver","offer_id":43320378687637,"sku":"13614","price":12000.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43320378720405,"sku":"13615","price":12000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Product-VT80SE-Front_jpg.webp?v=1714074553"},{"product_id":"phasemation-ma-5000-statement-monoblock-amplifier-pair","title":"Phasemation MA-5000 Statement Monoblock Amplifier (Pair)","description":"\u003ch2 class=\"product-title\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eStatement Monoblock Power Amplifier \u003c\/span\u003eMA-5000\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e300B Parallel Single-ended Tube Monaural Power Amplifier which can educe the music reality and even the artist's passion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn the world of audio amplifiers, the wide kinds of semiconductor amplifiers, tube amplifiers, etc. are released. Therefore, the respective audio features can be enjoyed as a hobby.　Especially tube power amplifiers adopting a tube called 'fine tube' such as 2A3 or 300B have well-established sound quality that cannot be expressed by semiconductor amplifiers and they are accepted consistently even in the modern era.　\"We would like to taste the best sound produced by a 300B amplifier composed by a parallel single-ended circuit adopting 300B which is the best tube among them and a circuit strongly driven by a transformer-coupled circuit adopting 2A3.\" In 2016, we have developed the monaural power amplifier, MA-2000, to respond to the user's thoughts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3\u003eMain feature\u003c\/h3\u003e\n\u003carticle\u003e\n\u003ch4\u003e300B parallel single-ended stage for fixed-bias single pure class-A operation\u003c\/h4\u003e\n\u003cp\u003eIn order to compose the single pure class-A circuit so that the innate goodness of 300B is expressed with the simplest operation, two fixed bias power supplies are allocated individually for the ended-tube of PSVANE WE300B and therefore the setup of the optimum operating point and stable operation are secured. Consequently, this strong power greater than 25W outputted by a parallel operation can be supplied for driving a speaker. By adding the power supply system having a timer control (for 1 minute) at the time of turning the power supply on, the operation with further high reliability is achieved.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eSOVTEK 2A3 for the transformer-coupled circuit driving PSVANE WE300B ended-tube optimally\u003c\/h4\u003e\n\u003cp\u003eWe utilize 2A3 which is well-established even as an ended tube for a transformer–coupled circuit to drive the ended tube 300B, set 2A3 to the optimum operating point, and secure the DC stability by supplying the individual fixed bias to 300B parallel circuits. Therefore, the speaker is driven with unshakable stability.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eComposing the non-feedback amplifier by adopting triode tubes in all stages\u003c\/h4\u003e\n\u003cp\u003eWe compose the non-feedback amplifier by adopting triode tubes, 12AX7SRPP+2A3+300B, in all stages. Therefore, the ability for reproducing dynamic and very expressive music is provided only possible from the non-feedback circuit.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eAdopting the output transformer and inter-stage transformer made by LUNDAHL in Sweden\u003c\/h4\u003e\n\u003cp\u003eBecause the inter-stage and output transformers made by LUNDAHL in Sweden are proper to compose this equipment and suited for the sound quality to be aimed by us, we have adopted them.　The fixed bias circuits are allocated individually for the ended-tube of 300B with utilizing the independent winding structure at the secondary side of the inter-stage transformer and therefore the setup of the optimum operating point and stable operation are secured by reading the meter directly.　The independent terminals able to drive an 8 or 4 ohm speaker are provided by utilizing the independent winding structure at the secondary side of the output transformer.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eComposed of two independent power choke transformers\u003c\/h4\u003e\n\u003cp\u003eBecause the power supplies from the independent power choke transformer are individually supplied for the driver stage (2A3) and power stage (300B parallel single-ended), the mutual interference between the input signal amplifier circuit and the speaker drive circuit is purged. Therefore, signals of various levels from infinitesimal signals to high power signals are amplified clearly.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eThoroughgoing design for decreasing the noise\u003c\/h4\u003e\n\u003cp\u003eWe have adopted the thoroughgoing design for decreasing the noise as follows:\u003cbr\u003e-Rectifier tube 5R4G which does not generate a switching noise in principle against a high voltage\u003cbr\u003epower supply\u003cbr\u003e-Rectifier circuits composing of choke transformers\u003cbr\u003e-DC ignition for heaters driven by complete DC power supplies for all tubes.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eTimer indicator and appearance\u003c\/h4\u003e\n\u003cp\u003eThe color of the timer indicator is red at the time of standby and changes to blue after 1 minute as a starting time. In addition, the impressive front glass with placing the two-color LED indicator on the front panel is designed as a stately appearance.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4\u003eMA-2000 Block diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.phasemation.com\/img\/product\/ma-2000\/diagram.jpg\"\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.phasemation.com\/img\/product\/ma-2000\/photo01.png\"\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3\u003eProduct Specification\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e300B Parallel Single-ended Monaural Power Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput impedance\u003c\/td\u003e\n\u003ctd\u003e47k ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e27dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidual noise\u003c\/td\u003e\n\u003ctd\u003e200µV or less: A-NET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated output\u003c\/td\u003e\n\u003ctd\u003e25W (THD: 5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency characteristics\u003c\/td\u003e\n\u003ctd\u003e10Hz to 40kHz (+0,–3dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput impedance\u003c\/td\u003e\n\u003ctd\u003e4 ohms, 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003e160W（230VAC, 50 to 60Hz）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\/Output terminals\u003c\/td\u003e\n\u003ctd\u003eTerminals made by FURUTECH CO.,LTD.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal dimensions (mm)\u003c\/td\u003e\n\u003ctd\u003e270（W） x 245（H） x 433（D）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e20ｋｇ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessories\u003c\/td\u003e\n\u003ctd\u003eAC power cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Phasemation","offers":[{"title":"Default Title","offer_id":46327013867669,"sku":"10060","price":159975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/ma2000.png?v=1653165605"},{"product_id":"conrad-johnson-art27a-monoblock-tube-amplifiers","title":"Conrad-Johnson ART27A Stereo Tube Amplifier","description":"\u003cp\u003eConrad-Johnson equipment is one of our first loves in Hi-Fi. The ART27A Mononblocks renew that love, drives our home system, and is the amp I'll be buried with. - Joe Parvey\u003c\/p\u003e\n\u003cp\u003e--\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_0\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/conrad-johnson-ART300-awards.png\" title=\"\" class=\"wp-image-3764\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_0 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eART150 and ART300 amplifiers\u003c\/h1\u003e\n\u003ch4\u003eIn celebration of our 40th anniversary, conrad-johnson has introduced two new ART amplifiers: the ART150 stereo amplifier and ART300 mono-block amplifier.\u003c\/h4\u003e\n\u003cbr\u003eThese amplifiers are designed for our own reference use as well as for industry professionals and dedicated audiophiles. As with previous anniversary products, these amplifiers will be offered as limited editions, with just 250 units of the ART150 and 125 pairs of the ART300 to be sold through selected conrad-johnson dealers and distributors. \u003cbr\u003e\n\u003ch4\u003eThe ART150 and ART300 amplifiers embrace our firm belief that the surest path to both state-of-the-art musicality and exceptional reliability is to keep the circuits simple and build them with the finest available parts.\u003c\/h4\u003e\n\u003cbr\u003eThe audio circuit of these amplifiers has just three elements, each as simple as possible, and each essential to the operation of the amplifier. A voltage gain amplifier (a single triode) is direct-coupled to a cathode coupled phase inverter (each phase handled by a single triode), which in turn drives the output stage. Power is developed by KT150 output tubes, chosen for their musical accuracy, high power, and reliability. A single pair is used for each channel to comfortably and reliably achieve the 150 Watts per channel power rating of the ART150, while two pairs are used to produce 300 Watts in the mono ART300. A small amount (about 12 dB) of loop negative feedback reduces distortion and achieves a sufficiently high damping factor to control reactive loudspeaker systems. To assure continued peak performance, the owner need only make a simple bias adjustment when new tubes are installed. Built in LED bias indicators allow the user to make this adjustment using only the supplied adjustment tool. \u003cbr\u003e\n\u003cblockquote\u003eSeparate, low impedance, discrete dc power supply regulators are provided for the input and phase-inverter stages, thoroughly isolating these stages from the power demands of the output stage. These power supplies are designed to maintain a rock solid supply at all audio frequencies.\u003c\/blockquote\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_1\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg\" title=\"\" class=\"et_pb_lightbox_image\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" srcset=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg 1080w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-300x169.jpg 300w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-768x432.jpg 768w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-1024x576.jpg 1024w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg\" title=\"\" class=\"wp-image-2835\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_1 et_pb_text_align_justified et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch4\u003eThe ART150 and ART300 amplifiers maintain the exacting quality standards for which conrad-johnson is internationally known.\u003c\/h4\u003e\n\u003cbr\u003eResistors are precision laser-trimmed metal foil types. CJD Teflon dielectric capacitors are used for coupling the inverter stage to the output stage, and to bypass the large value polypropylene capacitors in the regulated power supplies. Proprietary wide-bandwidth output transformers contribute to excellent high frequency performance. Even the machined gold plated OFC connectors and the internal wiring have been carefully selected for optimal sonic performance. Attention to every detail enable us to extract the full potential from our circuit designs and ensures that our products will perform to this potential for years to come. The ART150 and ART300 are built without compromise to achieve a new standard in musical performance, and they are built to last.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003eThe Art300 is sold in pairs. \u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_2 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cbr\u003e\n\u003ch5\u003ePower: ART150 Amplifier\u003c\/h5\u003e\n\u003cbr\u003e150 Watts rms per channel from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads) \u003cbr\u003e\n\u003ch5\u003ePower: ART300 Amplifier\u003c\/h5\u003e\n\u003cbr\u003e300 Watts rms from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads) \u003cbr\u003e\n\u003ch5\u003eSensitivity\u003c\/h5\u003e\n\u003cbr\u003e1.0V rms to rated power \u003cbr\u003e\n\u003ch5\u003eFrequency Response (at 10 watts)\u003c\/h5\u003e\n\u003cbr\u003e20 Hz to 20 kHz, +\/- .25 dB \u003cbr\u003e\n\u003ch5\u003eHum and Noise\u003c\/h5\u003e\n\u003cbr\u003e108 dB below rated power \u003cbr\u003e\n\u003ch5\u003eInput Impedance\u003c\/h5\u003e\n\u003cbr\u003e100 kOhms \u003cbr\u003e\n\u003ch5\u003eTube Complement\u003c\/h5\u003e\n\u003cbr\u003eART150 – 3 x 6922, 4 x KT150 \u003cbr\u003eART300 – 2 x 6922, 4 x KT150 \u003cbr\u003e\n\u003ch5\u003eDimensions\u003c\/h5\u003e\n\u003cbr\u003e16.3125D x 19W x 8.75H inches \u003cbr\u003e\n\u003ch5\u003eWeight\u003c\/h5\u003e\n\u003cbr\u003eART150 80 lbs. \u003cbr\u003eART300 73 lbs. \u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003e3-Year Warranty\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cbr\u003eEvery conrad-johnson ART Amplifier is patiently and carefully hand assembled, then individually inspected and its performance verified by an experienced audio technician. \u003cbr\u003e\n\u003cblockquote\u003eThe owner is protected by our three-year limited warranty covering labor and parts except vacuum tubes.\u003c\/blockquote\u003e\n\u003cbr\u003eService is a top priority at conrad-johnson. In the event that a product does require service, it will be handled promptly and efficiently\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_3 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eProduct Reviews\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_0_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/HIFI-Awards-Power-Amplifier-Conrad-Johnson-A300.pdf\" class=\"et_pb_button et_pb_button_0 et_pb_bg_layout_light\" target=\"_blank\"\u003eHIFI+ Amp of the Year\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_1_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/positive-feedback.com\/audio-discourse\/conrad-johnson-40th-anniversary-art300-monoblock-tube-amplifiers-part-1-forty-years-and-still-going-strong\/\" class=\"et_pb_button et_pb_button_1 et_pb_bg_layout_light\" target=\"_blank\"\u003ePositive Feedback\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_2_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"http:\/\/www.tonepublications.com\/review\/the-conrad-johnson-art-150-power-amplifier\/\" class=\"et_pb_button et_pb_button_2 et_pb_bg_layout_light\" target=\"_blank\"\u003eTONE Audio\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_3_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/07\/Conrad-Johnson-ART300-review-HIFI.pdf\" class=\"et_pb_button et_pb_button_3 et_pb_bg_layout_light\" target=\"_blank\"\u003eHIFI+\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_4 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eOwner’s Manuals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_4_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART150-amplifier-owners-manual-rev0122_2018.pdf\" class=\"et_pb_button et_pb_button_4 et_pb_bg_layout_light\" target=\"_blank\"\u003eDownload ART150\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_5_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART300-amplifier-owners-manual-rev_0123_2018.pdf\" class=\"et_pb_button et_pb_button_5 et_pb_bg_layout_light\" target=\"_blank\"\u003eDownload ART300\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c!--more--\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":46327037165717,"sku":"11187","price":22000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-ART150-amplifier-e1611691045742_361371d4-290b-48f0-a2ea-0dae3cd504ad.jpg?v=1637357473"},{"product_id":"conrad-johnson-art108a-monoblock-tube-amplifiers","title":"Conrad-Johnson ART108A Monoblock Tube Amplifiers","description":"\u003cp\u003eConrad-Johnson equipment is one of our first loves in Hi-Fi. The ART27A Mononblocks renew that love, drives our home system, and is the amp I'll be buried with. - Joe Parvey\u003c\/p\u003e\n\u003cp\u003e--\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_0\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/conrad-johnson-ART300-awards.png\" title=\"\" class=\"wp-image-3764\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_0 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eART150 and ART300 amplifiers\u003c\/h1\u003e\n\u003ch4\u003eIn celebration of our 40th anniversary, conrad-johnson has introduced two new ART amplifiers: the ART150 stereo amplifier and ART300 mono-block amplifier.\u003c\/h4\u003e\n\u003cbr\u003eThese amplifiers are designed for our own reference use as well as for industry professionals and dedicated audiophiles. As with previous anniversary products, these amplifiers will be offered as limited editions, with just 250 units of the ART150 and 125 pairs of the ART300 to be sold through selected conrad-johnson dealers and distributors. \u003cbr\u003e\n\u003ch4\u003eThe ART150 and ART300 amplifiers embrace our firm belief that the surest path to both state-of-the-art musicality and exceptional reliability is to keep the circuits simple and build them with the finest available parts.\u003c\/h4\u003e\n\u003cbr\u003eThe audio circuit of these amplifiers has just three elements, each as simple as possible, and each essential to the operation of the amplifier. A voltage gain amplifier (a single triode) is direct-coupled to a cathode coupled phase inverter (each phase handled by a single triode), which in turn drives the output stage. Power is developed by KT150 output tubes, chosen for their musical accuracy, high power, and reliability. A single pair is used for each channel to comfortably and reliably achieve the 150 Watts per channel power rating of the ART150, while two pairs are used to produce 300 Watts in the mono ART300. A small amount (about 12 dB) of loop negative feedback reduces distortion and achieves a sufficiently high damping factor to control reactive loudspeaker systems. To assure continued peak performance, the owner need only make a simple bias adjustment when new tubes are installed. Built in LED bias indicators allow the user to make this adjustment using only the supplied adjustment tool. \u003cbr\u003e\n\u003cblockquote\u003eSeparate, low impedance, discrete dc power supply regulators are provided for the input and phase-inverter stages, thoroughly isolating these stages from the power demands of the output stage. These power supplies are designed to maintain a rock solid supply at all audio frequencies.\u003c\/blockquote\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_image et_pb_image_1\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg\" title=\"\" class=\"et_pb_lightbox_image\"\u003e\u003cspan class=\"et_pb_image_wrap\"\u003e\u003cimg height=\"auto\" width=\"auto\" alt=\"\" srcset=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg 1080w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-300x169.jpg 300w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-768x432.jpg 768w, https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080-1024x576.jpg 1024w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" src=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2017\/07\/conrad-johnson-ART300-amplifier-angle-1080.jpg\" title=\"\" class=\"wp-image-2835\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_1 et_pb_text_align_justified et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch4\u003eThe ART150 and ART300 amplifiers maintain the exacting quality standards for which conrad-johnson is internationally known.\u003c\/h4\u003e\n\u003cbr\u003eResistors are precision laser-trimmed metal foil types. CJD Teflon dielectric capacitors are used for coupling the inverter stage to the output stage, and to bypass the large value polypropylene capacitors in the regulated power supplies. Proprietary wide-bandwidth output transformers contribute to excellent high frequency performance. Even the machined gold plated OFC connectors and the internal wiring have been carefully selected for optimal sonic performance. Attention to every detail enable us to extract the full potential from our circuit designs and ensures that our products will perform to this potential for years to come. The ART150 and ART300 are built without compromise to achieve a new standard in musical performance, and they are built to last.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003eThe Art300 is sold in pairs. \u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_2 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cbr\u003e\n\u003ch5\u003ePower: ART150 Amplifier\u003c\/h5\u003e\n\u003cbr\u003e150 Watts rms per channel from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads) \u003cbr\u003e\n\u003ch5\u003ePower: ART300 Amplifier\u003c\/h5\u003e\n\u003cbr\u003e300 Watts rms from 30 Hz to 15 KHz at no more than 1.5 % THD into 4 ohms (also available connected for 16 ohm loads) \u003cbr\u003e\n\u003ch5\u003eSensitivity\u003c\/h5\u003e\n\u003cbr\u003e1.0V rms to rated power \u003cbr\u003e\n\u003ch5\u003eFrequency Response (at 10 watts)\u003c\/h5\u003e\n\u003cbr\u003e20 Hz to 20 kHz, +\/- .25 dB \u003cbr\u003e\n\u003ch5\u003eHum and Noise\u003c\/h5\u003e\n\u003cbr\u003e108 dB below rated power \u003cbr\u003e\n\u003ch5\u003eInput Impedance\u003c\/h5\u003e\n\u003cbr\u003e100 kOhms \u003cbr\u003e\n\u003ch5\u003eTube Complement\u003c\/h5\u003e\n\u003cbr\u003eART150 – 3 x 6922, 4 x KT150 \u003cbr\u003eART300 – 2 x 6922, 4 x KT150 \u003cbr\u003e\n\u003ch5\u003eDimensions\u003c\/h5\u003e\n\u003cbr\u003e16.3125D x 19W x 8.75H inches \u003cbr\u003e\n\u003ch5\u003eWeight\u003c\/h5\u003e\n\u003cbr\u003eART150 80 lbs. \u003cbr\u003eART300 73 lbs. \u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003e3-Year Warranty\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cbr\u003eEvery conrad-johnson ART Amplifier is patiently and carefully hand assembled, then individually inspected and its performance verified by an experienced audio technician. \u003cbr\u003e\n\u003cblockquote\u003eThe owner is protected by our three-year limited warranty covering labor and parts except vacuum tubes.\u003c\/blockquote\u003e\n\u003cbr\u003eService is a top priority at conrad-johnson. In the event that a product does require service, it will be handled promptly and efficiently\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_with_border et_pb_module et_pb_text et_pb_text_3 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eProduct Reviews\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_0_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/12\/HIFI-Awards-Power-Amplifier-Conrad-Johnson-A300.pdf\" class=\"et_pb_button et_pb_button_0 et_pb_bg_layout_light\" target=\"_blank\"\u003eHIFI+ Amp of the Year\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_1_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/positive-feedback.com\/audio-discourse\/conrad-johnson-40th-anniversary-art300-monoblock-tube-amplifiers-part-1-forty-years-and-still-going-strong\/\" class=\"et_pb_button et_pb_button_1 et_pb_bg_layout_light\" target=\"_blank\"\u003ePositive Feedback\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_2_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"http:\/\/www.tonepublications.com\/review\/the-conrad-johnson-art-150-power-amplifier\/\" class=\"et_pb_button et_pb_button_2 et_pb_bg_layout_light\" target=\"_blank\"\u003eTONE Audio\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_3_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2019\/07\/Conrad-Johnson-ART300-review-HIFI.pdf\" class=\"et_pb_button et_pb_button_3 et_pb_bg_layout_light\" target=\"_blank\"\u003eHIFI+\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_module et_pb_text et_pb_text_4 et_pb_text_align_left et_pb_bg_layout_light\"\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_text_inner\"\u003e\n\u003cbr\u003e\n\u003ch5\u003e\u003cstrong\u003eOwner’s Manuals\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr class=\"gradient-black-left\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_4_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART150-amplifier-owners-manual-rev0122_2018.pdf\" class=\"et_pb_button et_pb_button_4 et_pb_bg_layout_light\" target=\"_blank\"\u003eDownload ART150\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"et_pb_button_module_wrapper et_pb_button_5_wrapper et_pb_button_alignment_left et_pb_module\"\u003e\u003ca href=\"https:\/\/conradjohnson.com\/wp-content\/uploads\/2018\/01\/conrad-johnson-ART300-amplifier-owners-manual-rev_0123_2018.pdf\" class=\"et_pb_button et_pb_button_5 et_pb_bg_layout_light\" target=\"_blank\"\u003eDownload ART300\u003c\/a\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c!--more--\u003e","brand":"Conrad-Johnson","offers":[{"title":"Default Title","offer_id":46327038836885,"sku":"11187","price":52000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/products\/conrad-johnson-ART150-amplifier-e1611691045742_361371d4-290b-48f0-a2ea-0dae3cd504ad.jpg?v=1637357473"},{"product_id":"modwright-instruments-ls-100-tube-preamp","title":"ModWright Instruments LS 100 Tube Preamp","description":"\u003cdiv style=\"width:1600px;margin:0 auto;\"\u003e\n\n\u003cdiv style=\"max-width:1200px;margin:0 auto;font-family:Arial,sans-serif;text-align:center;\"\u003e\n  \u003cdiv style=\"padding:40px 20px;\"\u003e\n    \u003ch1 style=\"font-size:56px;margin:0 0 10px;font-weight:800;\"\u003eLS 100 Tube Preamp\u003c\/h1\u003e\n\n  \u003c\/div\u003e\n  \u003c!-- Image --\u003e\n  \u003cdiv style=\"background:#ffffff;padding:40px 20px;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ls100.webp?v=1775146328\" alt=\"Product Image\" style=\"max-width:100%;height:auto;\"\u003e\n  \u003c\/div\u003e\n\n\u003chr style=\"border:none;height:2px;width:100%;margin:50px 0;background:linear-gradient(to right, transparent, #000000, transparent);\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"max-width:1200px;margin:0 auto;display:flex;flex-wrap:wrap;align-items:center;font-family:Arial,sans-serif;\"\u003e\n\n  \u003c!-- Text --\u003e\n  \u003cdiv style=\"padding:20px;color:#000000;line-height:1.6;font-size:18px;\"\u003e\n    \u003cp\u003eNew \u003cb\u003eLS 100 tube single-ended preamp\u003c\/b\u003e from ModWright Instruments!\n\u003cbr\u003e\u003cbr\u003e\nThe design goal of the LS 100 was to pick up where the 9.0SE, our first product to be produced, over seven years ago, to the next level. We strove for improved sonics, aesthetics and functionality.\n\u003cbr\u003e\u003cbr\u003e\nWe Succeeded!\n\u003cbr\u003e\u003cbr\u003e\nSingle-ended design with 10 function remote control, (2) 6SN7 (Driver) and (1) 5AR4\/GZ34 rectifier. Single gain\/buffer stage, phase inverting, five standard inputs, one Monitor input and tape output, one Home Theater Bypass (HT\/BP) input and three main sets of RCA outs.\n\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eRemote Control Functions Include:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower.\u003c\/li\u003e\n\u003cli\u003eTwo remote trigger outputs.\u003c\/li\u003e\n\u003cli\u003eSelectable balance control, may be bypassed for cleaner signal path.\u003c\/li\u003e\n\u003cli\u003eVolume control.\u003c\/li\u003e\n\u003cli\u003eMute.\u003c\/li\u003e\n\u003cli\u003eInput select.\u003c\/li\u003e\n\u003cli\u003eMonitor input select.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003ePreamp Functions Include:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade slot for Optional in-board Phono stage.\u003c\/li\u003e\n\u003cli\u003eBuilt in headphone amp fed via tube driver stage.\u003c\/li\u003e\n\u003cli\u003eHome Theater Bypass.\u003c\/li\u003e\n\u003cli\u003eAll pushbutton control, no toggle switches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eLS 100 Tube PHONO OPTION:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOne pair RCA inputs.\u003c\/li\u003e\n\u003cli\u003eTube Design: (1)12AX7, (1)12AU7\u003c\/li\u003e\n\u003cli\u003eMC: Total gain = 63dB (including preamp stage)\u003c\/li\u003e\n\u003cli\u003eMM: 12AX7 replaced with 12AU7 = 48dB gain.\u003c\/li\u003e\n\u003cli\u003eLoading: 50, 100, 500, 1K, 47K, 100pf via internal dip switches.\u003cbr\u003e\n[USER\/DEALER INSTALLABLE OPTION]\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe LS 100 is built in the same size enclosure as the KWA 100 amplifier and has the same lines and aesthetics, including backlit logo. Taller enclosure (5”) allows for greater range of rectifier tubes to fit inside the enclosure.\n\u003cbr\u003e\u003cbr\u003e\nSonically, the LS 100 offers a greater control, ease, musicality and resolution, all perfectly balanced for the ideal musical experience. Frequency response is flat from 20Hz to well beyond 100Khz. Soundstage is extremely wide and detail and microdynamics co-exist with a tube warmth and natural musical presentation that must be experienced!\n\u003cbr\u003e\u003cbr\u003e\n\u003cb\u003eRecommended Tube Upgrades for the LS100:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOutput Tube: Sophia Electric 6SN7 – Sophia Electric\u003c\/li\u003e\n\u003cli\u003eRectifier Tube: Mullard, Amperex or Philips GZ34 Made in Holland.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTube – Solid-State Hybrid System Design: The ModWright Way\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\n  \u003cdiv style=\"max-width:1200px;margin:0 auto;font-family:Arial,sans-serif;text-align:center;\"\u003e\n  \u003c!-- Image --\u003e\n  \u003cdiv style=\"background:#ffffff;padding:40px 20px;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ls10001-w1000h680.webp?v=1775146328\" alt=\"Product Image\" style=\"max-width:100%;height:auto;\"\u003e\n  \u003c\/div\u003e\n\n\u003chr style=\"border:none;height:2px;width:100%;margin:50px 0;background:linear-gradient(to right, transparent, #000000, transparent);\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"max-width:1200px;margin:0 auto;font-family:Arial,sans-serif;color:#333;\"\u003e\n\n  \u003c!-- Title --\u003e\n  \u003ch2 style=\"font-size:56px;margin:40px 0 30px 0;font-weight:800;\"\u003eTechnical Spec\u003c\/h2\u003e\n\n  \u003c!-- Grid --\u003e\n  \u003cdiv style=\"display:flex;flex-wrap:wrap;gap:40px;\"\u003e\n\n    \u003c!-- Column 1 --\u003e\n    \u003cdiv style=\"flex:1;min-width:280px;line-height:1.6;\"\u003e\n      \u003cstrong\u003eTube Complement: \u003c\/strong\u003e\u003cbr\u003e\n(2) 6SN7 driver tubes; (1) 5AR4 rectifier tube (may also use 5U4GB and 5V4GB).\n\u003cbr\u003e\nInternal tube rectified, solid state regulated power supply.\n      \u003cbr\u003e\n      \u003cstrong\u003eFeatures: \u003c\/strong\u003e\u003cbr\u003e\n      Four sets of RCA inputs.\n\u003cbr\u003e\nOne set of XLR inputs (wired single-ended).\n\u003cbr\u003e\nTwo sets RCA main outputs.\n\u003cbr\u003e\nOne set of XLR main outputs (wired single-ended).\n\u003cbr\u003e\nOne set of RCA Tape outputs.\n\u003cbr\u003e\nOne set of RCA Monitor Inputs.\n\u003cbr\u003e\nOne set of RCA Home Theater Bypass (HT\/BP) inputs.\n\u003cbr\u003e\nTwo 12V remote trigger outputs.\n    \u003c\/div\u003e\n\n    \u003c!-- Column 2 --\u003e\n    \u003cdiv style=\"flex:1;min-width:280px;line-height:1.6;\"\u003e\n      \u003cstrong\u003eGain: \u003c\/strong\u003e\u003cbr\u003e\n11 dB\u003cbr\u003e\n      \u003cstrong\u003eInput Impedance: \u003c\/strong\u003e\u003cbr\u003e\n38Kohms.\n  \u003cbr\u003e\n      \u003cstrong\u003eOutput Impedance: \u003c\/strong\u003e\u003cbr\u003e\n300 ohms.\n      \u003cbr\u003e\n      \u003cstrong\u003eFrequency Response: \u003c\/strong\u003e\u003cbr\u003e\n20hz – 100Khz (+\/-1dB).\u003cbr\u003e\n      \u003cstrong\u003eMax input signal level:  \u003c\/strong\u003e\u003cbr\u003e\n10 Vrms\u003cbr\u003e\n      \u003cstrong\u003eMax output signal level:  \u003c\/strong\u003e\u003cbr\u003e\n37 Vrms\n    \u003c\/div\u003e\n\n    \u003c!-- Column 3 --\u003e\n    \u003cdiv style=\"flex:1;min-width:280px;line-height:1.6;\"\u003e\n      \n      \u003cstrong\u003eHeadphone Amp Power: \u003c\/strong\u003e\u003cbr\u003e\n1.5 Watts (32 ohm – 600 ohm load).\u003cbr\u003e\n       \u003cstrong\u003ePhono Option: \u003c\/strong\u003e\u003cbr\u003e\nMM\/MC (Gain = 48dB\/63dB).\n      \u003cbr\u003e\n       \u003cstrong\u003eTube Compliment: \u003c\/strong\u003e\u003cbr\u003e\n(1)12AX7; (1)12AU7.\n      \u003cbr\u003e\n       \u003cstrong\u003eLoading: \u003c\/strong\u003e\u003cbr\u003e\n50, 100, 500, 1K, 47K, 100pf.\n      \u003cbr\u003e\n       \u003cstrong\u003eInputs: \u003c\/strong\u003e\u003cbr\u003e\nOne pair RCA.\n      \u003cbr\u003e\n       \u003cstrong\u003eDimensions: \u003c\/strong\u003e\u003cbr\u003e\n17.75Wx17.5Dx6.5H\n      \u003cbr\u003e\n       \u003cstrong\u003eWeight: \u003c\/strong\u003e\u003cbr\u003e\n25 lbs. (31 lbs. shipped)\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n   \u003cdiv style=\"max-width:1200px; margin:0 auto; font-family: Arial, sans-serif; line-height:1.6; color:#000;\"\u003e\n\u003ch2 style=\"font-size:56px;margin:40px 0 30px 0;font-weight:800;\"\u003eDownloads\u003c\/h2\u003e\n  \u003c!-- Item 1 --\u003e\n  \u003cdiv style=\"margin-bottom:12px;font-size:18px;\"\u003e\n    \u003ca href=\"https:\/\/www.modwright.com\/wp-content\/uploads\/1491927986ls100ownersmanualfinal.pdf\" target=\"_blank\" style=\"color:#1a73e8; text-decoration:none;\"\u003e\n      LS 100 Owner's Manual\n    \u003c\/a\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ModWright Instruments","offers":[{"title":"Standard","offer_id":47223937958037,"sku":null,"price":5000.0,"currency_code":"USD","in_stock":true},{"title":"LS 100 Phono Upgrade","offer_id":47223937990805,"sku":null,"price":5850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/ls-100-front-pic.webp?v=1775147048"},{"product_id":"phasemation-sa-1500-integrated-amplifier","title":"Phasemation SA-1500 Integrated Amplifier","description":"\u003ch3 style=\"text-align: center;\"\u003e\u003cem\u003eDraws out the music’s reality and the artist’s passion A 300B single vacuum tube type stereo integrated amplifier.\u003c\/em\u003e\u003c\/h3\u003e\n\u003cp\u003eIn the world of audio amplifiers, wide kinds of semiconductor amplifiers, tube amplifiers, etc. are released. Therefore, the respective audio features can be enjoyed as a hobby. The tube power amplifiers have a tube called \"fine tube\" having a reputation for sound quality and in 2017, Phasemation has released the monaural power amplifier, MA-1500 composed by a single-ended circuit adopting 300B which is the best tube among vacuum tubes and a circuit strongly driven by a transformer-coupled circuit. In 2024, in order to express this significance to a wider audience, we developed the SA-1500 stereo integrated amplifier with a single operation of a 300B single-tube and ensuring a 9W output.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ca href=\"https:\/\/phasemation.com\/img\/product\/sa-1500\/data.pdf\" style=\"background: #fff; color: #000; border: 1px solid #000; padding: 16px 24px; text-decoration: none; border-radius: 16px; display: inline-block; margin: 10px; min-width: 260px; text-align: center;\" target=\"_blank\"\u003e \u003cstrong\u003eDetailed Information Download\u003c\/strong\u003e\u003cbr\u003e⬇ \u003c\/a\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch3 style=\"text-align: left;\"\u003eMain Feature:\u003c\/h3\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eOutput tubes 300B optimally driven with 6SN7\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eThe 300B output tube is a self-biased single pure class-A operation, and 6SN7 is used in a two-stage amplification circuit to demonstrate the original quality of the 300B in the simplest possible operation, driving speakers with unshakable stability\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eNon feedback amplifier with triode tubes in all stages\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eTwo-stage 6SN7 +300B all-stage triode tube to achieve the dynamic and expressive music playing that is only possible with a non-feedback circuit\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eOutput transformer made by Lundahl, Sweden\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eAn output transformer manufactured by Lundahl of Sweden is used because it is appropriate for the configuration of this unit and has the most suitable sound quality that Phasemation is aiming for. A shared terminal is supplied to optimally drive the speakers from 4 to 8 ohms\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eIndependent dual power choke transformer configuration\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eThe power supply circuits for the left and right channels are powered by independent choke coils, eliminating mutual interference between the left and right channels and providing clear amplification of signals from minute levels to high-power signals.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eA thorough low noise design\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eThis is thoroughly designed for a low-noise; it is designed with a rectification circuit with a ROHM high-speed switching diode and choke transformer for the high-voltage power supply and the 300B heater using DC ignition with a DC power supply. Furthermore, the power transformer is floating from the chassis using anti-vibration rubber used in the MA-5000. This suppresses the transmission of unwanted vibrations to the chassis and contributes to further reduction of noise levels\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003ePower amplifier direct function\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eThree RCA input terminals are provided. In addition, the “DIRECT mode” is provided on the “INPUT1” terminal. By selecting this “DIRECT mode,” the music signal passes through the volume control, allowing the unit to be used as a “stereo power amplifier” with even higher purity and a greater atmospheric expression.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/rear_54cf3936-088b-416f-a606-1f9bfeed595d_1024x1024.png?v=1779760045\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003ch3 style=\"text-align: left;\"\u003eProduct Specification:\u003c\/h3\u003e\n\u003ctable style=\"width: 101.16%; height: 272px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e300B Stereo Integrated Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eInput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e47k ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eGain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e30dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eResidual noise\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e200µV or less: A-NET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eRated output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e9W or more \/ 4 ohms (THD: 5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eFrequency characteristics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e10Hz to 40kHz (+0,–3dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eOutput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e4 ohms to 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003ePower consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e140W（100VAC, 50 to 60Hz）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1944px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 39.1944px;\"\u003e\u003cstrong\u003eExternal dimensions (mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 39.1944px;\"\u003e430（W） x 240（H） x 380（D）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5972px;\"\u003e\n\u003ctd style=\"width: 42.7558%; height: 19.5972px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 56.9485%; height: 19.5972px;\"\u003e18kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Phasemation","offers":[{"title":"Gold","offer_id":47384329945237,"sku":"SA-1500G","price":19975.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":47384329978005,"sku":"SA-1500B","price":19975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/phasemation-sa-1500-05_54941963-d44f-4e46-b6f9-5d2489932f4d.jpg?v=1779760045"},{"product_id":"phasemation-ma-3000-monaural-power-amplifiter","title":"Phasemation MA-3000 Monaural Power Amplifiter","description":"\u003ch3 class=\"product-title\" style=\"text-align: center;\"\u003e\u003cem\u003e\u003cstrong\u003e300B Parallel Single-ended Tube Monaural Power Amplifier which can educe the music reality and even the artist's passion\u003c\/strong\u003e\u003c\/em\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIn the world of audio amplifiers, the wide kinds of semiconductor amplifiers, tube amplifiers, etc. are released. Therefore, the respective audio features can be enjoyed as a hobby.　Especially tube power amplifiers adopting a tube called 'fine tube' such as 2A3 or 300B have well-established sound quality that cannot be expressed by semiconductor amplifiers and they are accepted consistently even in the modern era.　\"We would like to taste the best sound produced by a 300B amplifier composed by a parallel single-ended circuit adopting 300B which is the best tube among them and a circuit strongly driven by a transformer-coupled circuit adopting 2A3.\" In 2016, we have developed the monaural power amplifier, MA-2000, to respond to the user's thoughts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" class=\"main_box\"\u003e\n\u003ch3 style=\"text-align: left;\"\u003eMain Feature:\u003c\/h3\u003e\n\u003carticle\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003e300B parallel single-ended stage for fixed-bias single pure class-A operation\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eIn order to compose the single pure class-A circuit so that the innate goodness of 300B is expressed with the simplest operation, two fixed bias power supplies are allocated individually for the ended-tube of PSVANE WE300B and therefore the setup of the optimum operating point and stable operation are secured. Consequently, this strong power greater than 25W outputted by a parallel operation can be supplied for driving a speaker. By adding the power supply system having a timer control (for 1 minute) at the time of turning the power supply on, the operation with further high reliability is achieved.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eSOVTEK 2A3 for the transformer-coupled circuit driving PSVANE WE300B ended-tube optimally\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eWe utilize 2A3 which is well-established even as an ended tube for a transformer–coupled circuit to drive the ended tube 300B, set 2A3 to the optimum operating point, and secure the DC stability by supplying the individual fixed bias to 300B parallel circuits. Therefore, the speaker is driven with unshakable stability.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eComposing the non-feedback amplifier by adopting triode tubes in all stages\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eWe compose the non-feedback amplifier by adopting triode tubes, 12AX7SRPP+2A3+300B, in all stages. Therefore, the ability for reproducing dynamic and very expressive music is provided only possible from the non-feedback circuit.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eAdopting the output transformer and inter-stage transformer made by LUNDAHL in Sweden\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eBecause the inter-stage and output transformers made by LUNDAHL in Sweden are proper to compose this equipment and suited for the sound quality to be aimed by us, we have adopted them.　The fixed bias circuits are allocated individually for the ended-tube of 300B with utilizing the independent winding structure at the secondary side of the inter-stage transformer and therefore the setup of the optimum operating point and stable operation are secured by reading the meter directly.　The independent terminals able to drive an 8 or 4 ohm speaker are provided by utilizing the independent winding structure at the secondary side of the output transformer.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eComposed of two independent power choke transformers\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eBecause the power supplies from the independent power choke transformer are individually supplied for the driver stage (2A3) and power stage (300B parallel single-ended), the mutual interference between the input signal amplifier circuit and the speaker drive circuit is purged. Therefore, signals of various levels from infinitesimal signals to high power signals are amplified clearly.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eThoroughgoing design for decreasing the noise\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eWe have adopted the thoroughgoing design for decreasing the noise as follows:\u003cbr\u003e-Rectifier tube 5R4G which does not generate a switching noise in principle against a high voltage\u003cbr\u003epower supply\u003cbr\u003e-Rectifier circuits composing of choke transformers\u003cbr\u003e-DC ignition for heaters driven by complete DC power supplies for all tubes.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eTimer indicator and appearance\u003c\/h4\u003e\n\u003cp style=\"text-align: left;\"\u003eThe color of the timer indicator is red at the time of standby and changes to blue after 1 minute as a starting time. In addition, the impressive front glass with placing the two-color LED indicator on the front panel is designed as a stately appearance.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003ch4 style=\"text-align: left;\"\u003eMA-2000 Block diagram\u003c\/h4\u003e\n\u003c\/article\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003cp\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/www.phasemation.com\/img\/product\/ma-2000\/diagram.jpg\"\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle\u003e\n\u003cp\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/www.phasemation.com\/img\/product\/ma-2000\/photo01.png\"\u003e\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"main_box\"\u003e\n\u003ch3 style=\"text-align: left;\"\u003eProduct Specification:\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; height: 235.126px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e300B Parallel Single-ended Monaural Power Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eInput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e47k ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eGain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e27dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eResidual noise\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e200µV or less: A-NET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eRated output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e25W (THD: 5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eFrequency characteristics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e10Hz to 40kHz (+0,–3dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eOutput impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e4 ohms, 8 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003ePower consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e160W（230VAC, 50 to 60Hz）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eInput\/Output terminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003eTerminals made by FURUTECH CO.,LTD.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eExternal dimensions (mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e270（W） x 245（H） x 433（D）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003e20ｋｇ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.3757%; height: 19.5938px;\"\u003e\u003cstrong\u003eAccessories\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.7257%; height: 19.5938px;\"\u003eAC power cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Phasemation","offers":[{"title":"Default Title","offer_id":47387160969365,"sku":"MA-3000","price":49975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/photo_3.png?v=1779849330"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/collections\/conrad-johnson-ART300-amplifier-angle-1080.jpg?v=1640830469","url":"https:\/\/houseofstereo.com\/es-ca\/collections\/tube-amplifiers\/preamplifiers+modwright-instruments.oembed","provider":"House Of Stereo","version":"1.0","type":"link"}