i just read here: http://www.axiomaudio.com/research_PowerTestRoom.html
that the M80s have been tested for 100 hours with heavy metal music, at 700 Watts continuous input power, with peaks of 1000 Watts!

this is very impressive, but it brings a question:
if this speaker is good for 700 Watts cont. input power, why then do you rate the speakers at 400 Watts, and not at 700 Watts ?

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