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Timing doesn’t look like the main issue here; this is an older multichannel power amp class where the real question is whether the channel count, power, and condition still fit your system. At US$750, it lands above the US$368 median and above the US$844 75th percentile? No — it sits below that upper quartile, so this reads as a fair-to-steady ask, not a bargain, but not an aggressive stretch either.
What makes it interesting is that these Audio Design Associates amps were built for serious home-theater or distributed-audio duty, with the kind of channel density that can replace several smaller amps in one box. If you need lots of clean watts in a single chassis, the upside is convenience and rack simplicity; the main thing to verify is basic health, since older multichannel amps can be heavy, run warm, and are more dependent on proper servicing than simpler two-channel gear.
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)
