{"product_id":"grado-reference4","title":"Grado Reference4","description":"\u003csection style=\"\n  position: relative;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  display: flex;\n  align-items: center;\n  justify-content: center;\n\"\u003e\n\n  \u003c!-- Lớp hình ảnh --\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-042_5fd75398-af09-43d3-84d6-2226f4994dd2.webp?v=1779024769\" alt=\"Grado Reference4\" style=\"\n      width: 100%;\n      height: auto;\n      display: block;\n      filter: brightness(80%) blur(1px);\n      transform: scale(1.05);\n    \"\u003e\n\n  \u003c!-- Lớp phủ gradient --\u003e\n  \u003cdiv style=\"\n    position: absolute;\n    top: 0;\n    left: 0;\n    width: 100%;\n    height: 100%;\n    background: linear-gradient(to right, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.4) 50%, rgba(0,0,0,0) 100%);\n    z-index: 1;\n  \"\u003e\u003c\/div\u003e\n\n  \u003c!-- Lớp text --\u003e\n  \u003cdiv style=\"\n    position: absolute;\n    top: 50%;\n    left: 6%;\n    transform: translateY(-50%);\n    padding: 20px 30px;\n    text-align: center;\n    color: #ffffff;\n    max-width: 600px;\n    z-index: 2;\n  \"\u003e\n\n    \u003ch2 style=\"\n      font-size: 64px;\n      font-weight: 400;\n      font-family: 'Times New Roman', serif;\n      letter-spacing: 1px;\n      margin: 10px 0;\n      line-height: 1.1;\n      color: #ffffff;\n    \"\u003e\n      Reference4\n    \u003c\/h2\u003e\n  \u003c\/div\u003e\n\n\u003c\/section\u003e\n\n\u003c!-- SECTION 1 --\u003e\n\u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n\"\u003e\n\n  \u003cdiv style=\"\n    width: 50%;\n    background-color: #0d0d0d;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #ffffff;\n    \"\u003e\n      Description\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #ffffff;\n      margin: 0;\n    \"\u003eReference4 is part of the Grado Timbre Series, representing a refined balance of resolution, control, and musicality. Developed through decades of cartridge design, it brings a high level of performance to a wider range of systems while maintaining the tonal integrity that defines Grado cartridges.\n\u003cbr\u003e\u003cbr\u003e\nBuilt on Grado’s moving iron design, Reference4 delivers a stable and highly responsive presentation with low moving mass and long-term consistency.\n\u003cbr\u003e\u003cbr\u003e\nOffered in both stereo and mono configurations, Reference4 continues the tradition of Grado’s wood body cartridges.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Timbre-Master_Reference_af0fd598-76fe-425e-807b-4b266abfeee1.webp?v=1779024767\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003c!-- SECTION 2 --\u003e\n\u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n  border-top: none;\n\"\u003e\n\n  \u003c!-- Cột bên trái: Hình ảnh --\u003e\n  \u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/c52b293da5ac--Cartridges-045.webp?v=1779024768\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- Cột bên phải: Thông số kỹ thuật --\u003e\n  \u003cdiv style=\"\n    width: 50%;\n    background-color: #0d0d0d;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #ffffff;\n    \"\u003e\n      Specifications\n    \u003c\/h2\u003e\n    \u003cul style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #ffffff;\n      margin: 0;\n      padding-left: 20px;\n      list-style-type: disc;\n    \"\u003e\n      \u003cli\u003eBody: American Osage Wood\u003c\/li\u003e\n      \u003cli\u003eCantilever:Machined Boron\/Shibata Diamond\u003c\/li\u003e\n      \u003cli\u003eOutput:\u003cbr\u003e\nHigh 4.0mV @5 CMV (45)\u003cbr\u003e\nLow 1.0mV @5 CMV (45)\u003c\/li\u003e\n      \u003cli\u003eInductance:\u003cbr\u003e\nHigh Output 55mH\u003cbr\u003e\nLow Output 6mH\u003c\/li\u003e\n      \u003cli\u003eResistance:\u003cbr\u003e\nHigh Output 660 ohms\u003cbr\u003e\nLow Output 70 ohms\u003c\/li\u003e\n      \u003cli\u003eInput Load: 10k-47k ohms\u003c\/li\u003e\n      \u003cli\u003eCartridge Weight: 9.6 grams\u003c\/li\u003e\n      \u003cli\u003eTracking Force: 1.6-1.9 grams\u003c\/li\u003e\n      \u003cli\u003eCompliance: 20µm\/mN\u003c\/li\u003e\n      \u003cli\u003eChannel Seperation: Average 30db-10-30k Hz\u003c\/li\u003e\n      \u003cli\u003eControlled Frequency Response: 10-60 kHz\u003c\/li\u003e\n      \u003cli\u003eNon-Sensative to Capacitive Load\u003c\/li\u003e\n      \u003cli\u003eBuilds: High Output, Low Output, Mono\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n  border-top: none;\n\"\u003e\n  \u003cdiv style=\"\n    width: 50%;\n    background-color: #0d0d0d;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #ffffff;\n    \"\u003e\n      Performance\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #ffffff;\n      margin: 0;\n    \"\u003eReference4 is available in both high and low output configurations, allowing for compatibility across a wide range of phono stages.\n\u003cbr\u003e\u003cbr\u003e\nIts presentation is defined by clarity, refinement, and control. Detail is resolved with precision while maintaining a smooth and composed top end. The midrange carries natural presence and texture, and low frequencies are delivered with definition and authority.\n\u003cbr\u003e\u003cbr\u003e\nComplex passages are handled with ease, maintaining separation and spatial stability. The overall balance remains even and composed, allowing the structure of the recording to come through naturally.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-042_5fd75398-af09-43d3-84d6-2226f4994dd2.webp?v=1779024769\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n  \u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n  border-top: none;\n\"\u003e\n\n\u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-044_c13fe890-7d2f-4b51-bd19-039d18a5a774.webp?v=1779024768\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n    \n  \u003cdiv style=\"\n    width: 50%;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n    text-align: right;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #000000;\n      \n    \"\u003e\n      Moving Iron Design\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #000000;\n      margin: 0;\n    \"\u003eAll Grado cartridges utilize a moving iron design built on Joseph Grado’s patented flux-bridger principle.\n\u003cbr\u003e\u003cbr\u003e\nThis approach allows the cartridge to generate a precise signal with extremely low moving mass, while keeping the coil structure fixed. The result is a presentation that combines speed, control, and harmonic integrity without the fragility often associated with traditional moving coil systems.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/section\u003e\n\n  \u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n  border-top: none;\n\"\u003e\n  \u003cdiv style=\"\n    width: 50%;\n    background-color: #0d0d0d;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #ffffff;\n    \"\u003e\n      Diamond \u0026amp; Cantilever\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #ffffff;\n      margin: 0;\n      margin-bottom: 25px;\n    \"\u003eReference4 features a nude Shibata diamond mounted to a machined boron cantilever.\n\u003cbr\u003e\u003cbr\u003e\nThe Shibata profile is highly effective at retrieving detail from the groove, offering exceptional contact and resolution while maintaining a natural, unforced presentation. Paired with a machined boron cantilever—known for its low mass and responsive behavior—the system delivers clarity, speed, and stability across the frequency range.\n    \u003c\/p\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-041_8aab141f-4e91-4c02-8a20-83d89b7e05a0.webp?v=1779024768\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n  \u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n  border-top: none;\n\"\u003e\n\n\u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-041_8aab141f-4e91-4c02-8a20-83d89b7e05a0.webp?v=1779024768\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv style=\"\n    width: 50%;\n    background-color: #ffffff;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n    text-align: right;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #000000;\n    \"\u003e\n      Coil \u0026amp; Internal Structure\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #000000;\n      margin: 0;\n    \"\u003eThe internal signal path is built using ultra-high purity 6N OCC copper, selected for its conductivity and consistency.\n\u003cbr\u003e\u003cbr\u003e\nEach cartridge undergoes cryogenic treatment and internal damping to reduce unwanted resonance and preserve signal integrity.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/section\u003e\n\n\u003csection style=\"\n  display: flex;\n  justify-content: center;\n  align-items: stretch;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  background-color: #000;\n  color: #fff;\n  font-family: 'Inter', sans-serif;\n  border-top: none;\n\"\u003e\n  \u003cdiv style=\"\n    width: 50%;\n    background-color: #0d0d0d;\n    padding: 60px 40px;\n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    box-sizing: border-box;\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 30px;\n      font-weight: 500;\n      margin-bottom: 25px;\n      line-height: 1.2;\n      color: #ffffff;\n    \"\u003e\n      Housing\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 16px;\n      line-height: 1.7;\n      color: #ffffff;\n      margin: 0;\n      margin-bottom: 25px;\n    \"\u003eThe Reference4 is housed in an American Osage wood body, selected for its ability to help control resonance and contribute to the cartridge’s tonal balance. The reshaped housing improves visibility of the cantilever during setup, allowing for more precise alignment while supporting compatibility across a wide range of tonearms.\n    \u003c\/p\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"\n    width: 50%;\n    position: relative;\n    overflow: hidden;\n    display: flex;\n  \"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-038_1decac45-5593-4f89-aa9e-15bf034189bf.webp?v=1779024767\" alt=\"Grado Reference4\" style=\"\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        display: block;\n      \"\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n  \n\n\u003csection style=\"\n  position: relative;\n  width: 100%;\n  max-width: 1600px;\n  margin: 0 auto;\n  overflow: hidden;\n  font-family: 'Inter', sans-serif;\n  text-align: center;\n  color: #000;\n\"\u003e\n\n  \u003c!-- Hình nền --\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Cartridges-042_5fd75398-af09-43d3-84d6-2226f4994dd2.webp?v=1779024769\" alt=\"Grado Reference4\" style=\"\n      width: 100%;\n      height: auto;\n      display: block;\n      filter: brightness(80%) blur(2px);\n      transform: scale(1.05);\n    \"\u003e\n\n  \u003c!-- Lớp phủ mờ --\u003e\n  \u003cdiv style=\"\n    position: absolute;\n    top: 0;\n    left: 0;\n    width: 100%;\n    height: 100%;\n    background: rgba(255,255,255,0.2);\n    z-index: 1;\n  \"\u003e\u003c\/div\u003e\n\n  \u003c!-- Hộp nội dung --\u003e\n  \u003cdiv style=\"\n    position: absolute;\n    top: 50%;\n    left: 50%;\n    transform: translate(-50%, -50%);\n    width: 80%;\n    background: rgba(255, 255, 255, 0.85);\n    padding: 60px 80px;\n    border-radius: 0; \/* Không bo góc *\/\n    z-index: 2;\n    box-shadow: 0 4px 20px rgba(0,0,0,0.2);\n  \"\u003e\n    \u003ch2 style=\"\n      font-size: 38px;\n      font-weight: 500;\n      margin-bottom: 20px;\n    \"\u003e\n      Wood Cartridge Upgrade Program\n    \u003c\/h2\u003e\n    \u003cp style=\"\n      font-size: 18px;\n      line-height: 1.6;\n      margin: 0 auto;\n      max-width: 90%;\n      color: #111;\n    \"\u003eGrado wood body cartridges are supported through our Wood Cartridge Upgrade Program.\n\u003cbr\u003e\u003cbr\u003e\nThis program allows you to move from your current Grado wood cartridge to another model, with a pricing accommodation provided through the program. The program applies exclusively to Grado wood body cartridges, and pricing is based on the model being purchased.\n\u003cbr\u003e\u003cbr\u003e\nFor details and current pricing, please contact us and state the model you are interested in purchasing.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n ","brand":"Grado Labs","offers":[{"title":"Cartridge","offer_id":47359007948949,"sku":null,"price":2123.0,"currency_code":"CAD","in_stock":true},{"title":"with Replacement Stylus","offer_id":47359007981717,"sku":null,"price":3537.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/7117\/6085\/files\/Timbre-Master_Reference_d3bf2978-ee6d-4f76-bcd1-7f1d340176c0.webp?v=1779024805","url":"https:\/\/houseofstereo.com\/es-ca\/products\/grado-reference4","provider":"House Of Stereo","version":"1.0","type":"link"}