Originally Posted by
grumpy
The last unit I played with was the older PAD-300/18 for delaying a full-range center channel
in 3-ch music-only system.
I did not use it to integrate drivers within a single speaker.
When it worked and the input/output levels were set properly, it sounded pretty good
(the delay effect provided more enjoyment than any detriment to sound quality).
The problem I experienced was glitching sounds (I think) due to failing RAM chips.
I eventually gave up on it.
I would expect a 7922 to sound better and hopefully have fewer issues (being newer).
I don't know if they are serviceable (esp. parts availability/obsolescence).