I have the predecessor to this amp, which is nearly identical. It sounds great on every set of speakers I have hooked it up to, and has enough power to drive just about anything you may throw at it. Purchased mine used for about $400 and could not be happier. I did have a speaker selector switch go bad, but Parasound sent me one free with a phone call. Talked to the head honcho (Richard Schram) as well...he answered the phone in tech support.