Reference 200.5 S2

About the Reference 200.5 S2

The B&K Reference 200.5 S2 is a five-channel high power amplifier introduced in 2004, designed for use in all types of audio or audio/video systems. It features a Class A predriver stage and AB MOSFET power output stages, providing efficient, linear power delivery and protection from thermal overload. The amplifier delivers 200 watts per channel into 8 ohms and 375 watts per channel into 4 ohms, with a peak current of 75 amps and dynamic headroom of 1.2 dB. It offers a frequency response from 5 Hz to 45 kHz, total harmonic distortion of 0.09%, and a damping factor of 450 at 50 Hz. The unit includes balanced (XLR) and unbalanced (RCA) inputs, with input sensitivities of 2.8 volts and 1.4 volts respectively. It has a gain of 28 dB and input impedance of 33.2 kΩ. The amplifier is equipped with high-quality components such as 1% metal film resistors, computer grade electrolytic capacitors, and a high capacity toroidal transformer for clean power supply. It also features gold-plated connectors, five-way binding posts supporting up to 4 AWG wire, and control input/output for system integration. The amplifier weighs 74 lbs and measures 17" wide, 7.5" high, and 19.5" deep. It consumes up to 1830 watts at maximum power and 130 watts at idle. The Reference 200.5 S2 is hand assembled in Buffalo, NY, USA, and was sold with a 5-year factory warranty through authorized dealers. It is highly regarded for its detailed, transparent, and musical sound reproduction, suitable for demanding audiophile speakers and home theater systems.