Since the mid-1990s they have expanded into the home theater market, producing DVD players and surround sound processors in addition to their original vacuum tube designs.

The company is notable as one of the few U.S. manufacturers of vacuum tube amplifiers.

Many of their high-end "Classic Series" designs have received favorable reviews in audiophile publications, including The Absolute Sound, Stereophile and Soundstage!.

Their CAD280 SE V12 stereo amplifier received a CES 2001 "Best of Show" designation from reviewer Jim Saxon.

[2] Dentron, Ameritron and Amp Supply Company were all based originally in Ohio.