RB-985

About the RB-985

The Rotel RB-985 is a 5-channel power amplifier introduced in the mid-1990s, designed for home theater use and multi-channel audio systems. It is THX certified, ensuring high-quality and reliable power output. Each of the five channels delivers 100 watts RMS into 8 ohms, with a frequency response from 10 Hz to 80 kHz (±0.5 dB), and total harmonic distortion below 0.03%. The amplifier features a damping factor of 180 and a signal-to-noise ratio of 115 dB, providing clean and dynamic sound reproduction. It is stable down to 4 ohms speaker impedance and includes protection circuitry that disconnects input signals if overheating or excessive current occurs. The unit has a robust build with a black metal chassis, weighs approximately 15.5 kg (34 pounds), and measures 440 x 139 x 396 mm (17 3/8" W x 5 1/2" H x 15 5/8" D). Inputs are via RCA connectors and a multi-pin DB-25 connector for simplified cabling. The RB-985 is suitable for both home theater surround sound setups and bi-amping stereo systems, featuring a discrete modular circuit design and a large toroidal transformer for stable power delivery. It was originally