Hi warfer21,
Do you have the M60s set to Large or Small? Try setting them to Small on the setup menu (if you had them at Large) , and use an 80-Hz or 60-Hz crossover in the menu.
How big a room are you running these in? Personal taste varies a lot regarding volume levels, and enthusiasts who like things really loud should go to a separate power amp for the mains. Most A/V receiver power output ratings are grossly exaggerated since they are measured with only one or two channels driven and usually at a single frequency rather than across the audible bandwidth.
Regards,
