2007年3月3日 · The Rotel RB-991 is an exceptional performer, especially considering its modest price and generous power rating. Its resolution of detail and overall neutrality hint at a performance level that one would expect from an amp costing two or three times as much.

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Description: Solid-state stereo power amplifier. Output: 200Wpc into 8 ohms (23dBW), 300Wpc into 4 ohms (21.8dBW). Frequency response: <10Hz–100kHz, ±1dB. Damping factor: >500. Total harmonic distortion: <0.03%. Intermodulation distortion: <0.03%. Signal/noise ratio: 120dB. Price: $999 (1999); no longer available (2007).

Power output: 200 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 100kHz. Total harmonic distortion: 0.03% Damping factor: 500. Input sensitivity: 1V. Signal to noise ratio: 120dB. Speaker load impedance: 4Ω to 16Ω. Dimensions: 440 x 127 x 385mm. Weight: 16.7kg.

The RB-991 is a basic two-channel power amplifier rated at 200 watts per channel into 8 ohms, 300 watts into 4 ohms. Starting from the dual secondary windings in the large (1000 vA) toroidal power transformer, the RB-991 is of dual-mono design, with each channel having its own rectifiers and power supply capacitors.

200Wpc RB-991 ? The power supply is based on a multiple-secondary toroidal transformer rated at 12kVA. From the transformer on, each channel's power supply is separate, with individual recti- fier arrays and banks of BHC slit-foil capadtors. According to Rotel, 20 out- put devices (10 per channel) are em- ployed to maximize stability and relia-

2024年5月17日 · Used Rotel RB-991 Stereo power amplifiers for sale on 400+ second hand hifi sites & shops. Use Hifi Shark to monitor pricing and global availability.