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HiFi Rose RA280 Integrated Amplifier (Black)

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HiFi Rose Ingegrated Amplifier Overview

Product Information

Model: HFRIARA280BLK | UPC: 18809576420200


What's In The Box

Product Information

Model: HFRIARA280BLK | UPC: 18809576420200

Top-Notch Master Integrated Amplifier

The RA280 is an integrated amplifier that inherits the innovative technologies used in RA180. Enjoy pure, natural, sound as close to the original as you can get. A near-perfect sound that transcends the boundaries between digital and analog technologies with excellent linearity achieved through strong power damping and short dead time.

Form Follows Sound

The design of the RA280 is differentiated by its inner purity. ROSE pursues a pure, natural sound that is reflected in all parts based on their design philosophy of externalizing the internal parts. The RA280 is high-quality in terms of overall solid finish and functionality, while at the same time achieving harmony between the interior and exterior through a design that focuses on acoustic aspects. The sturdy aluminum chassis at the top, matte finish, and elaborate arrangement of groves satisfy both functionality and progressive exterior design.

Two Completely Separated Mono Amplifier Modules

The RA280 is designed with two separate amplifier modules that operate like a mono amplifier, supporting 250 W (4 Ωand 8 Ω) for the left and right amplifiers respectively, outputting 500 W on a stereo channel. The RA280 applies two-stage analog filter technology designed by HiFi Rose to achieve the best sound quality. Their LC filter provides excellent frequency response by offering -1 db attenuation in the frequency band up to 65 kHz and -3 dB attenuation in the 85 kHz range. This technology dramatically reduces carrier noise caused by the inherent switching of Class D amplifiers, providing clearer and cleaner sound quality in all. The spatial description and resolution have been greatly Improved, creating an evolved sound with an analog feel.

High-Efficiency Power Supply

The RA280 actively utilizes the latest technology via a power supply circuit independently developed by HiFi ROSE. This circuit uses silicon carbide FET instead of silicon FET. Silicon carbide FET is a power semiconductor device with high voltage and high heat resistance, it has higher efficiency and generates less heat than silicon FET, enabling optimal power supply. Based on innovative design of the materials and structure, the RA280 stably provides high output while minimizing heat generation to deliver the best sound quality. In addition, RA280 applies a 2.5 KW power factor correction (PFC) circuit Independently designed by HIFI ROSE and introduces a high-capacity condenser to maintain excellent performance even under rapid load situations This allows for a stronger response In terms of stability and reliability.

Phono Amplifier That Supports Moving Magnet

The RA280 supports moving magnet Input with a simple switch selection, The RA280 amplifies the very weak audio signal captured by the cartridge, processes it without distortion, and uses high-precision compensation circuitry developed by HiFi ROSE to deliver sound as close to the original sound as possible. The RA280's phono amplifier supports moving magnet cartridge input, which can be activated with a simple switch selection. The activated phono amplifier amplifies the very weak audio signals captured by the cartridge with precision and processes them without distortion. Additionally, It utilizes a high-precision correction circuit independently developed by HiFi ROSE to deliver audio signals as close to the original sound as possible. In essence, it offers the best sound quality without compromising the fine details of the audio signal and the original impression of the music, The RA280's phono amplifier perfectly provides the essential elements for high-quality music playback, taking the performance of your audio system to the next level and allowing you to enjoy richer, more vivid sound.


  • Design
    • Size (W x H x D): 16.92" x 4.05" x 13.97"
    • Weight: 20.94 lbs
    • Body: Solid Aluminum, Rust-Proof Steel
  • Amplifier Output
    • 4 Ω: 250W x 2ch (500W)
    • 8 Ω: 250W x 2ch (500W)
  • Subwoofer Output
    • Mono: 1Vrms (2.218 dBu)
  • Input Sensitivity
    • Balanced Input: 600mV (250W x 2ch)
    • Unbalance (Line 1,2,3) Input: 600mV (250W x 2ch)
    • Phono (MM) Input: 5mV (250W x 2ch)
  • Input Impedance
    • Balanced Input: 47kΩ
    • Unbalance (Line 1,2,3) Input: 47kΩ
    • Phono (MM) Input: 47kΩBandwidth
    • 20 Hz ~ 20kHz: +0,0dB (250W x 2ch, 8Ω Speaker Output)
    • 10 Hz ~ 66kHz: +0,-1dB (250W x 2ch, 8Ω Speaker Output)
    • 10 Hz ~ 85kHz: +0,-3dB (250W x 2ch, 8Ω Speaker Output)
  • Frequency Response
    • 20 Hz ~ 20kHz: +0,0dB (1W x 2ch, 8Ω Speaker Output)
    • 10 Hz ~ 66kHz: +0,0dB (1W x 2ch, 8Ω Speaker Output)
    • 10 Hz ~ 85kHz: +0,0dB (1W x 2ch, 8Ω Speaker Output)
  • THD (Total Harmonic Distortion)
    • Balanced & Unbalanced (Line 1,2,3) Input: 0.007% (@125W)
  • Damping Factor
    • Speaker Output: >250 (250W x 2ch 
  • S/N Signal to Noise Ratio
    • Balanced/Unbalanced/Phono (MM): 109dB/109dB/85dB
  • Output Impendence
    • Speaker Output: 30mΩ (250W x 2ch)
  • Tone Control
    • Bass (100Hz)/Treble (10kHz): +/- 15dB (1W x 2ch, 8Ω Speaker Output)
  • Phono (MM)
    • Turnover: 500Hz (+ 13 dB@100Hz)
    • Roll-off: 2.1 kHz (- 13.7dB@10kHz)
  • Power
    • Output Power: 500W (SMPS)
    • Input Voltage: AC100-230V, 50/60H 
  • Audio In/Out on Rear
    • Trigger In: Voltage can be turned on 3.3V~12V
    • Trigger Out: Voltage can be turned on 12V
  • Remote Control
    • IR Input: 38kHz Infrared Ray (Within 10m of Operating Distance)

What's In The Box

  • RA280 Integrated Amplifier
  • Remote
  • Power Cord
  • Maanual
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