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About the S100
The Audio Research S-100 is a high-performance solid-state stereo power amplifier from Audio Research's new core amplification line, designed by Mike Bettinger. It employs a dual-mono architecture with separate toroidal transformers per channel, a differential JFET-based input stage, and Class-AB bipolar transistor output stages for exceptional clarity, dynamics, and low distortion. Fully balanced from input to output, it supports both balanced (XLR) and single-ended (RCA) inputs selectable from the rear panel. Housed in a compact chassis with custom machined heatsinks, it offers classic ARC styling and is praised for its midrange fluidity, bass control, openness, and ability to drive demanding speakers without strain. Ideal for pairing with LS-3 or LS-2 preamps.
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