i have 700 Watts/ch/4 Ohms for my M80's, but of course, with the size of my room (about 1400 cu.ft), i have lots of reserve power.

the max power this amp has taken so far from the wall receptacle is around 575 Watts, playing Super 8 Blu-ray at reference level.
no sweat at all...

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery