Absolute Pure Sound Integrated Amplifier

RA180

The RA180 is a state-of-the-art integrated amplifier using the latest innovative technologies. Power damping and dead times were reduced to 1/10 or less. Linearity was dramatically improved to create a near-perfect sound that transcends the boundaries between digital and analog. Enjoy the pure sound of nature provided by the RA180.

New Concept Class AD Amplifier

The amplifier has developed from Class A to AB to Class D. Class AB was developed to improve the high heat generation and low efficiency of A. Class D has higher efficiency and higher output than AB, and also significantly improved S/N and THD characteristics compared to A and AB. However, the sound quality has been evaluated as inferior to A/AB due to the limitations of the digital circuit. The GaN class AD amplifier developed by HiFi ROSE has dramatically improved the problems of the existing Class D by applying innovative new materials.

Class AD Amplifier

Class D amplifiers have a topology that theoretically provides a perfect linear output at 0% distortion and 100% power efficiency. In order to achieve this, the switching action requires high speed and accuracy. However, previous products were weak compared to Class A/AB in the linearity aspect due to the limitations of silicon FET, which had couldn't produce a smooth and natural sound. In the RA180, a new material, GaN FET, was used instead of Silicon FET to solve this problem. The dead time was dramatically improved to 1/10 or less, and a nearly perfect linear output was realized with a switching speed close to zero. This linearity goes beyond the Class D limits and produces a smooth and natural sound, like an analog amplifier.

Multi Output Component

The RA180 consists of two modules: one AMP module specialized for stable mid-bass and balance, and another specialized for smooth high-pitched and super tweeter areas. Each AMP module supports 200 W (8 Ω) and can output up to 400 W per channel. When two independent modules are connected to a speaker's high and low frequencies separately, the driving force can be greatly improved without being affected by a counter electro-motive force. BTL mode combines two independent modules for rich, balanced sound.

Designed to Play Up to the Super Tweeter Realm

The human hearing range has an upper limit of 15-20kHz. So, is there no need for higher frequencies? Temporarily high treble extends well beyond 20kHz, even in harmonious sound. For example, trumpets have a frequency response that extends to 100kHz, and 88.2kHz to 192kHz sources have a 40kHz to 96kHz frequency response. RA180 has an output range of 20Hz to 50kHz, 100kHz @-3dB, 200kHz @-6dB: designed with wide frequency response range so that even high-resolution sound sources are not filtered out. Although this playability may be outside a person's hearing range, it faithfully reproduces a wide frequency range, which contributes to expressing a deep and wide sound field with the original sound.

Balanced Power Supply

The power supply that has been exclusively developed for the RA180 applies 4th generation SiC FET technology to provide high output with less heat. In addition, by using a self-developed PFC (power factor circuit), it is designed not to be affected by sudden load fluctuations. The power supply device was developed to support a powerful damping factor of at least 200, and the high output of 1000 W is designed to produce powerful bass and soft treble.

PHONO Amplifier with Variable EQ

The purpose of the PHONO amplifier provided by the RA180 is for the recording producer to accurately reproduce the original intention. It also reproduces the original sound as it is, which is the principle of HiFi ROSE. It is designed to respond to a variety of vinyl records with low-mid bass TURNOVER and high-frequency ROLL OFF adjustment functions. Amplifies the very weak signal picked up by the cartridge and keep it as close as possible to the original sound. MOVING MAGNET and MOVING COIL STAGES are provided with a simple switch selection and EQ values corresponding to curves from various record manufacturers are provided using parts with a 0.1% tolerance.

REVIEW & AWARDS

HiFi Rose RA180 Integrated Amplifier - Read More

"After reviewing the HiFi Rose 150B streaming DAC, I was so impressed that I purchased the review sample. It has remained the digital heart of my system. The RA180 ranks in the same league as the HiFi Rose 150B. It offers value both in build and sound quality, significantly surpassing its price point. This unit has the headroom to handle just about any speaker. And while sound quality is certainly the most important criterion, I must say, again, that the industrial design of this unit is spectacular. HiFi Rose is a relative newcomer to this market, but there’s no doubt the company is here to stay." - Rives Bird

HiFi Rose RA180 integrated amplifier - Read More

"Except perhaps for this impression of heightened detail, the RA180 remained mostly neutral in its tonal balance. If anything, it ran slightly cool rather than warm. Once in a while, the RA180 verged on leaning a little too far to light, clean, and shiny, like a new penny. Yet, in any kind of music—delicate classical, hard funk, crystalline electronica, all the other stuff I played—the RA180 maintained its cool sense of control. " - Julie Mullins 

HiFi Rose RA180 - Read More

"Over the top in looks and functionality, this is a fantastic statement from HiFi Rose of what is possible in 2022. If you feel you’re going to use these features, then this is your amplifier but there are more conventional alternatives out there. But, if you get the chance to see this and play with it do so, it is crazy good. " - Simon Wilce

HiFi Rose RA180 Integrated Amplifier - Read More

"It's hard to look past the RA180's outspoken industrial design but many will surely relish the eccentric but well thought-out front fascia. It's not all for show, even if some of the standout features will only be relevant to specific classes of audiophiles. The Class D topology, with four GaN transistor amps, offers oodles of power and an engrossing performance, especially when paired with sympathetic speakers. " - Jamie Biesemans, Paul Miller

HiFi Rose GaN Integrated Amplifier RA180 Reviewed - Read More

"The HiFi Rose RA180 integrated amplifier is definitely a reference-level integrated amp, with newer GaN FET-based technology, advancing the current state of Class-D integrated amplifiers, making it one of the best you’ll find under $10,000.  While a couple of its features are clearly targeted at the Asian market, there’s still plenty to interest American audiophiles. With its balanced power supply delivering up to 400 watts per channel, the RA180 provides more than enough power for even the most difficult to drive loudspeakers. The build quality screams high-end, while the sound quality could easily be mistaken for a very good Class-AB amp, or maybe even a Class-A amp, with its transparent, smooth and natural sound, but without the heat generation, and with better efficiency. It’s feature-rich, sports a unique aesthetic, and is definitely engaging. At its price point, the RA180 is a good value when compared to the competition. The HiFi Rose RA180 is an integrated that will likely remain in buyers’ systems for years to come. " - Bob Barrett

HiFi Rose RA 180 - Read More

" While the obvious reason for buying this amp might seem to be to stand out from the crowd – relatively unknown name, mad styling – there’s a lot more to the RA 180 than meets the eye. This is a fine integrated amplifier with high-end aspirations it more than achieves, and provided you want a purely analogue amplifier built to perform on a par with much bulkier pre/power combinations, you won’t go far wrong here." - Andrew Everard

SPECIFICATIONS