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About the GS150
The Audio Research GS150 is a stereo tube power amplifier introduced in 2014, featuring four matched pairs of KT150 power output tubes and four 6H30 driver tubes. It delivers 155 watts per channel continuously from 20Hz to 20kHz, with a frequency response extending from 0.5Hz to 120kHz and a power bandwidth of 5Hz to 80kHz. The amplifier is designed with a fully balanced circuit and includes premium components such as custom transformers and capacitors. It has a striking front panel with three large meters displaying power output and bias levels, and a rear panel with balanced XLR inputs, 4- and 8-ohm speaker outputs, tube hour meter, 12V trigger, and RS-232 control. The GS150 is praised for its effortless dynamics, rich tonal colors, and exceptional clarity, capable of driving difficult speakers with authority and finesse. It produces a holographic soundstage with excellent spatial reproduction and a clean, sweet high-frequency response without rolloff. The amplifier consumes 730 watts at rated output and weighs 87 lbs net. Dimensions are 19" wide, 9 7/8" high, and 22 1/2" deep. It is considered a flagship model in Audio Research's lineup,
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