I've had many audiophile power amplifiers since I first got into the audio hobby in 1970, but I've discarded most of them in favour—yikes!—of some of the better, much less ex offerings from pro audio.
I don't recommend the Crown K2, which came out around 2000, for full-range duties, but it's a brilliant bass amp, comparable, for such duties, to the $15K Perreaux 750 mono amps I used to own. Output into the 4-ohm Tannoy subs is 800 Wrms/channel.
By rights, the Yamaha P7000S (650 w/ch @ 8 ohms) should just be another ho-hum, powerful-but-not-particularly-refined PA amp, readily available on the used market for a modest outlay. It is readily available for little money, but above 200 Hz or so, performs on a par with consumer models that cost thousands more. In a recent shootout with amps from Ayre and Bryston, a group of us found the Ayre in particular was the superior amp, but by so little that the ten-times-greater price removed all temptation to invest in one.
