ADC Sound Shaper SS-2 Mark III Vintage 10-Band Equalizer Hi-Fi Stereo EQ Tested

ADC most likely refers to Audio Dynamics Corporation, a U.S. hi-fi brand founded by Peter Pritchard in the early 1960s in New Milford, Connecticut. It should not be confused with ADC Telecommunications, which was a separate communications company. The audio brand’s heritage is firmly rooted in the classic American cartridge era, and it later passed into other ownership before disappearing as an independent maker.

ADC was best known for magnetic phono cartridges, especially high-performance models aimed at vinyl playback. Its identity was tied to turntable-era analog audio rather than a broad component catalog, and there is no strong evidence that it became a major player in amplifiers, speakers, DACs, or headphones.

In market terms, ADC sits today as a vintage-collector and analog-audio specialist brand rather than a current mainstream hi-fi label. Among knowledgeable buyers, it is remembered for inventive cartridge design and respectable sonic performance, with interest driven more by restored legacy products and archival reputation than by an active modern product line.