The Audio Research S-100 is a solid-state stereo power amplifier that translates the company's decades of valve-design philosophy into a dual-mono, fully balanced Class A/B platform. Its bipolar output stage was chosen for its inherent transparency and dynamic agility, allowing the amplifier to deliver 100 watts per channel into 8 ohms and to double that output into 4-ohm loads, a hallmark of a robust power supply anchored by dual toroidal transformers.
Housed in a machined aluminum chassis with custom heat sinks and a fastener-free front panel, the S-100 presents a sleeker, more contemporary interpretation of the classic Audio Research aesthetic. Every unit is assembled and proofed by ear at the company's Minnesota facility, ensuring the measured performance and low noise floor serve a fundamentally musical result.