Rose RA280 silver

Rose RA280 Hi-Fi Amplifier

The Rose RA280 is an integrated amplifier that inherits the innovative technologies used in the RA180, offering a special listening experience that allows you to feel the true essence of music. With a two-stage analog filter design and separate mono amplifier modules, the RA280 supports 250 W for the left and right amplifiers respectively, providing a total power of 500 W on a stereo channel.

Features

The Class AD amplifier with next-generation GaN FET technology is a significant advancement in the field of high fidelity. This technology combines the efficiency of Class D amplifiers with the sound quality of analog amplifiers. GaN FETs replace traditional silicon FETs, significantly reducing dead time in switching operations and improving signal linearity. As a result, the sound produced is more natural and smooth, similar to that of an analog amplifier, while maintaining high energy efficiency.

Separate Mono Amplification Modules

The RA280 features two fully separate mono amplification modules, providing 250 W (4 Ω) of power for each channel. This unique design ensures optimal stereo separation and exceptionally clear sound reproduction, immersing you in the heart of the music with stunning precision and dynamics.

High-Efficiency Power Supply

The RA280’s cutting-edge power supply utilizes a high-efficiency power supply circuit developed by HiFi ROSE. With its silicon carbide FET, it offers high resistance and minimal heat generation, ensuring stable power delivery and superior sound quality. The RA280 also incorporates a Power Factor Correction (PFC) circuit for optimal performance even under challenging load conditions.

Phono Preamplifier for Moving Magnet Cartridges

For vinyl enthusiasts, the RA280 is equipped with a high-precision phono preamplifier compatible with moving magnet cartridges. With a simple input selection, it adjusts the impedance and RIAA correction curve, allowing for faithful and detailed playback of your precious vinyl records.

Design and Construction

The RA280’s design stands out for its internal purity, reflecting ROSE’s design philosophy of externalizing internal components. The robust aluminum chassis, matte finish, and elaborate details contribute to an overall solid quality and high functionality, while achieving harmony between the interior and exterior through a design focused on acoustic aspects.

Product Benefits

• Two mono amplifier modules for optimal stereo separation
• Total power of 500 W for exceptional dynamics and clarity
• Two-stage analog filter technology for superior sound quality
• Elegant design and robust construction
• Intuitive user interface for a pleasant experience

Technical Specifications

Architecture

• Next-generation Advanced D (AD) class amplifier
• Improved sound linearity thanks to the new GaN (gallium nitride) material
• High-efficiency power circuit with silicon carbide Field Effect Transistor (FET)
• Independent mono amplification modules

Audio Performance

• Output power
  • 2 × 250 W at 4 Ω or 8 Ω
• Inputs
  • Balanced: 600 mV
  • Phono (MM): 5 mV, 0.5 mV
• Input impedance: 47 kΩ

Frequency Response

• Bandwidth (0 dBr ± 3 dB / 8 Ω)
  • Speaker output: 10 Hz – 66 kHz: +0, -1 dB
  • Speaker output: 10 Hz – 85 kHz: +0, -3 dB
• Frequency response (1 W ± 1 dB / 8 Ω)
  • Speaker output: 10 Hz – 66 kHz: +0, -1 dB
  • Speaker output: 10 Hz – 85 kHz: +0, -3 dB

Distortion and Damping

• Total Harmonic Distortion (THD) 125 W × 2 channels
  • Line 1, 2, 3: 0.007%
  • Phono (MM) input: 0.025%
• Damping factor: > 250 (250 W × 2 channels, 8 Ω)

Connectivity

• 1 stereo XLR input (right/left)
• 1 Phono (MM) input
• 3 RCA inputs
• 1 fixed (non-variable) subwoofer output
• 1 ground terminal (for turntable)
• 1 12 V trigger input and output

Physical Characteristics

• Chassis: solid aluminum, stainless steel
• Power supply: 100-230 V AC, 50/60 Hz
• Standby power consumption: 0.5 W
• Dimensions: 430 × 355 × 103 mm
• Weight: 9.5 kg