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At US$122, this sits well below the US$199 25th percentile and far under the US$316 median, so it reads as a strong bargain in the current used market. For a multi-room ADA control piece, that’s the kind of pricing that usually leaves enough room for service, integration parts, or a little patience if you’re building a system around it.
The upside here is practical: Audio Design Associates gear has a solid reputation in custom-install circles for robust signal routing and whole-home audio duties, and this kind of unit can be a smart way to add zones without paying modern new-gear money. If the unit is complete and powers up cleanly, this looks like a very worthwhile buy rather than a project to avoid; just confirm any needed remotes, power supply details, and rack/install accessories before committing.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Audio Design Associates, usually shortened to ADA, is an American hi-fi and custom-integration brand founded in 1977 in Westchester County, New York, by Albert G. Langella and Peter T. McKean. It grew out of a retail repair-and-installation business and became closely identified with the early custom A/V channel, including as a founding member of CEDIA. The company was later reported to have shut down in 2020, so its history is best understood as that of a significant legacy name rather than an active mainstream manufacturer.
ADA was best known for custom-install and home-theater electronics rather than a broad consumer-audio catalog. Its core products were multi-room audio systems, surround processors, power amplifiers, receivers, and control components, with an emphasis on integrated whole-home and cinema systems. It was not a major name in turntables, headphones, speakers, or cables, and it was never really positioned as a general-purpose hi-fi brand.
In the market, ADA sat in the high-end, niche boutique segment, especially for installers and system designers. Its reputation was built on technical ambition, early innovation in multi-room control, and robust, engineering-led products for serious custom installations. For hi-fi buyers, ADA is more of an install-centric cult/legacy brand than a collectible vintage marque, and the reported closure means used-market purchases should be approached with support and parts availability in mind.
See all Audio Design Associates listings on RADAR.
![Ada Audio Design Associates PTM-8100 8 Channel Power Amplifier [Tested]](https://i.ebayimg.com/images/g/sPwAAeSwb5ZpmN7a/s-l225.jpg)
