ROTEL RB-850

Second-hand, in good condition, it has some scratches (see pictures). Without its original package.

Power amplifier

The Rotel RB-850, produced between the late 1980s and early 1990s, represents an example of robustness and sonic precision. With a power output of 50 watts per channel at 8Ω in stereo configuration, it can deliver 150 watts in monoblock mode, providing ample power reserves for a wide range of speakers.

The frequency response of the RB-850 spans from 15 Hz to 100 kHz, with a tolerance of ±0.5 dB, ensuring faithful reproduction of audio frequencies. The total harmonic distortion is kept within 0.03%, ensuring clean and detailed sound.

Equipped with a dual-mono design, the RB-850 features separate transformers for the left and right channels, minimizing interference and improving stereo separation. This configuration contributes to a wide and three-dimensional soundstage.

The amplifier offers a signal-to-noise ratio of 116 dB, ensuring a distortion-free listening experience. The input sensitivity is 1 V, compatible with most audio sources.

Technical Specifications:

• Output power: 50 watts per channel at 8Ω (stereo), 150 watts at 8Ω (mono)
• Frequency response: 15 Hz to 100 kHz
• THD: 0.03%
• Damping factor: 280
• Input sensitivity: 1 V
• S/N ratio: 116 dB
• Load impedance: 4Ω to 16Ω
• Dimensions: 444 x 86 x 336 mm
• Weight: 9 kg