Hifi Rose - RA280 Integrated Amplifier

RA280 Integrated Amplifier Overview

The HiFi Rose RA280 Integrated Amplifier is a stereo amplifier with balanced and phono inputs. It features advanced Class D amplification with GaN FETs for smooth and accurate sound reproduction. The amplifier can deliver 250 watts into 8 ohms or 250 watts into 4 ohms. It also has treble and bass controls, a tone control bypass switch, and illuminated analog level meters. The amplifier includes an analog stereo RCA phono input for moving magnet cartridges and three line-level analog stereo RCA inputs. Additionally, it has a mono RCA output for connecting a powered subwoofer.

Product Description

The HiFi Rose RA280 Integrated Amplifier combines advanced technology with elegant design to deliver an exceptional audio experience. Building on the legacy of its predecessor, the RA180, the RA280 incorporates revolutionary Advanced Class D amplification technology. This technology offers both high efficiency and superior sound quality.

Innovative Advanced Class D Technology

HiFi Rose redefines digital amplification with the RA280’s Advanced Class D technology. It features next-generation GaN (gallium nitride) FETs, which surpass traditional Class D amplifiers. The RA280 achieves near-perfect linear output with minimal distortion, resulting in smooth and natural sound reproduction. It covers a wide frequency range from 20 Hz to 100 kHz, faithfully rendering every audio detail and creating a truly immersive and realistic listening experience.

Superior Mono Amplifier Design with Advanced Filtering

The RA280 stands out with its two completely separate mono amplifier modules, each delivering 250 W (4 Ω and 8 Ω) to the left and right channels, resulting in a total of 500 W in stereo mode. HiFi Rose’s advanced two-stage analog filter technology ensures top-tier sound quality. The LC filter provides exceptional frequency response, with -1 dB attenuation up to 65 kHz and -3 dB up to 85 kHz, effectively reducing carrier noise from Class D amplifiers. This results in pristine, detailed sound, enhanced spatial resolution, and a natural analog feel.

Elevate your vinyl listening experience with the RA280’s precision phono amplifier, designed for moving magnet cartridges. This high-performance amplifier, activated via a simple switch, amplifies delicate audio signals without distortion. HiFi Rose’s high-precision compensation circuitry delivers sound that is remarkably close to the original recording, ensuring rich, vivid detail and superior sound quality. This provides an immersive and high-fidelity music playback experience that brings your records to life.

The RA280 boasts a cutting-edge power supply that delivers unmatched performance.

HiFi Rose’s RA280 features a state-of-the-art power supply, utilizing silicon carbide FETs for superior efficiency and reduced heat compared to traditional silicon FETs. This innovative design ensures optimal power delivery and stability. The inclusion of a 2.5 power factor correction circuit and a high-capacity condenser maintains excellent performance even under rapid load changes, ensuring consistent and high-quality sound. The fourth-generation Silicon Carbide (SiC) FET technology enhances power output while minimizing heat, supporting deep bass and precise treble tones for powerful and accurate audio reproduction.

Specifacations 

Design  

Size: 16.9” W x 13.98” D x 4.06” H

Weight: 20.94 lbs

Body: Solid Aluminum, Rust-proof Steel

Amplifier Output  

FTC Power Output Rating (RMS): 250W x 2ch (8Ω, 20Hz-20kHz, THD 0.07%)

Frequency Range: 10Hz~80kHz (8Ω, 1W)

Load Impedance: 8Ω

Sub Woofer Output  

Mono: 1Wrms (2.218 dBu)

Balance Input: 600mV (≈ 250W x 2ch)

Input Sensitivity  

Unbalance(Line1,2,3) Input: 600mV (≈ 250W x 2ch)

Phono(MM) Input: 5mV (≈ 250W x 2ch)

Input Impedance  

Unbalance(Line1,2,3) Input: 47kΩ

Phono(MM) Input:  

Bandwidth  

20Hz ~ 20kHz: +0, 0dB (≈ 250W x 2ch, 8Ω Speaker Output)

10Hz ~ 66kHz: +0, -1dB (≈ 250W x 2ch, 8Ω Speaker Output)

10Hz ~ 85kHz: +0, -3dB (≈ 250W x 2ch, 8Ω Speaker Output)

20Hz ~ 20kHz: +0, 0dB (≈ 1W x 2ch, 8Ω Speaker Output)

10Hz ~ 66kHz: +0, -1dB (≈ 1W x 2ch, 8Ω Speaker Output)

10Hz ~ 85kHz: +0, -3dB (≈ 1W x 2ch, 8Ω Speaker Output)

THD (Total Harmonic Distortion)  

Balance & Unbalance(Line1,2,3) Input: 0.05% (8Ω, 1W to 250W, 1kHz)

Damping Factor  

Speaker Output: >250 (≈ 250W x 2ch)

S/N (Signal to Noise Ratio)  

Balanced / Unbalanced / Phono(MM): 109dB / 109dB / 85dB (≈ 250W x 2ch)

Output Impedance  

Speaker Output: 30mΩ (≈ 250W x 2ch)

Tone Control:

- Bass (100Hz) / Treble (10kHz): ±15dB (approximately 1W x 2 channels, Speaker Output)

- Turnover: 500Hz (+13dB at 100Hz) (approximately RIAA)

- Phono (MM):

  - Roll-off: 2.1kHz (-13.74dB at 10kHz) (approximately RIAA)

- Power:

  - Output Power: 500W (SMPS) (+ Maximum Output: 600W)

  - Input Voltage: AC100-240V, 50/60Hz (Standby Mode Power Consumption < 0.5W)

- 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)