thedelihaus. That amplified ADS unit that you mentioned is the unit my friend Dave had in his system. That was one good sounding system too! We listened to a lot great music on it too. We listened to alot of vinyl on his new Yamaha PX-3 linear tracker, what a great turntable that was, and alot of reel-to-reel tapes! All good stuff!
I really liked the sound of those delay systems too. When I was considering adding one to my system the ADS units were no longer available and the Audio Pulse units were the big boy on the market. I seriously considered buying one, but the fact they were unamplified and I would have had to buy additional amplifiers broke the bank, so I had to pass. Later on I looked at the Yamaha DSP-1 when it first came out but it was big, big bucks at the time, so I looked at a really nice Sony unit, and even bought and tried out a Koss unit. Unfortunately the Koss unit just wasn't a good match for my system so I returned it and by that time the Sony had whizzed through the marketplace never to be seen again, so I was just out of luck.
I never forgot how good those delay systems sounded when they were setup properly, but when the Dolby surround sound for movies came out, all the new delay products included surround sound settings for use with video and eliminated a lot of the music delay settings as a result. So that, combined with some extensive field assignments at work that kept me on the road for extended periods of time, caused me to lose interest.
However, a couple of years ago I saw a Yamaha DSP-1 on ebay and grabbed it for the princely sum of $75. The guy selling it even threw in a Sony Dolby Surround Sound unit that he used with the DSP-1. Both pieces were/are like brand new. That gear is currently stored and waiting to go in service in my garage/shop system. So eventually I'll get my delay system up and running.
Judging by the overwhelming interest shown in this thread so far, by the rest of the AK world, I would venture to say the you (thedelihaus), Coastsider, and me are apparently the only people still interested in them. Oh well, I'm still listening to LPs too.