S200

About the S200

The Audio Research S-200 is a high-performance stereo power amplifier delivering 200 watts per channel into 8 ohms and 400 watts into 4 ohms. Building on the S-100's circuit topology, it incorporates enhanced power supplies, a reinforced output stage, and greater dynamic headroom for demanding speakers. It features a differential JFET input stage, bipolar transistor voltage and output stages operating in Class AB, and a fully balanced signal path from input to output. The amplifier supports both balanced XLR and single-ended RCA inputs via a rear-panel switch, with dual white-on-black power meters on the front panel inspired by ARC's Reference series. Housed in a low-profile chassis with custom-machined heatsinks, it is hand-built in Minnesota, USA, as part of the 2025 55th Anniversary Series. Designed for authoritative sound with precision, control, and musicality, it excels in driving difficult loads while preserving detail and dynamics.