HiFiRose RA280 Integrated Amplifier
RA280 At A Glance
- Stereo integrated amp with balanced and phono inputs.
- Advanced Class D amplification with GaN FETs for smooth, accurate sound.
- 250 watts x 2 into 8 ohms; 250 watts x 2 into 4 ohms.
- Treble and bass controls.
- Tone control bypass switch.
- Illuminated analog level meters (3-level dimmer for front-panel illumination).
- Analog stereo RCA phono input for moving magnet cartridges.
- 3 line-level analog stereo RCA inputs.
- Mono RCA output for connecting a powered subwoofer
Product Description
The HiFiRose RA280 Integrated Amplifier represents a refined fusion of cutting-edge technology and sophisticated design, engineered to provide an exceptional audio experience. Evolving from the foundation laid by the RA180, this model incorporates the innovative Advanced Class D amplification technology, delivering enhanced efficiency alongside outstanding sound performance.
Innovative Advanced Class D Technology
The HiFiRose RA280 redefines digital amplification through its Advanced Class D technology, incorporating cutting-edge GaN (gallium nitride) FETs. This innovation outperforms conventional Class D designs by delivering sound quality that rivals analog amplification, while offering enhanced efficiency and power output. The RA280 produces a nearly linear output with exceptionally low distortion, ensuring smooth and natural sound reproduction. Spanning a broad frequency spectrum from 20 Hz to 100 kHz, it captures every nuance of the audio signal, providing an immersive and highly realistic listening experience.
Superior Mono Amplifier Design with Advanced Filtering
The RA280 features dual fully isolated mono amplifier units, each outputting 250 W into 4 Ω or 8 Ω loads, combining for a total of 500 W in stereo operation. HiFiRose’s sophisticated two-stage analog filter design delivers exceptional audio fidelity. Its LC filter maintains a frequency response with less than -1 dB attenuation up to 65 kHz and -3 dB up to 85 kHz, effectively minimizing carrier noise inherent in Class D amplification. This configuration produces clear, detailed audio with improved spatial imaging and an authentically analog sound character.
Cutting-Edge Power Supply for Unmatched Performance
The HiFi Rose RA280 integrated amplifier incorporates an advanced power supply featuring silicon carbide (SiC) FETs, offering greater efficiency and lower heat generation than conventional silicon FETs.
This cutting-edge technology provides stable and optimal power management. Equipped with a 2.5 power factor correction circuit and a large-capacity capacitor, the RA280 maintains exceptional performance during rapid load fluctuations, delivering consistent, high-fidelity sound. Its fourth-generation SiC FET design boosts power output while keeping thermal output minimal, enabling precise treble and deep bass for dynamic and accurate audio reproduction.
Specifications
| 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: | |
| 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 (≈ 1W x 2ch, Speaker Output) |
| Turnover: | 500Hz (+13dB@100Hz) (≈ RIAA) |
| Phono(MM) | |
| Roll-off: | 2.1kHz (-13.74dB@10kHz) (≈ 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) |
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