D100B

About the D100B

The Audio Research D100B is a solid-state dual-channel stereo power amplifier produced between 1977 and 1980. It delivers 100 watts per channel into 8 ohms with less than 0.2% total harmonic distortion, offering a transparent, airy sound with a liquid tube-like quality. It features an "Analog Module" front-end circuitry and is known for its reliability improvements over earlier versions. The amplifier is praised for its smooth highs, extended bass, and detailed sound reproduction, making it suitable for driving a wide range of speakers from full-range towers to smaller bookshelf models. It is rack-mountable with a robust build and weighs approximately 19 kg (40 lbs). The D100B can also be bridged into mono mode, delivering nearly four times its stereo power, providing exceptional impact and effortless sound at high volumes. Despite its age, it remains highly regarded for its sound quality and build, though it runs hot and may require careful maintenance. The amplifier was originally