The M80's are pretty efficient and at 4 ohms the 7125 can push about 190 watts. There are some Axiom owners scattered around here who can probably offer specific feedback about the M80 with both the 7125 and some of the 200W amps (770/755, M200/2200, and 7700/7500/7200). If I had to guess, I'd suspect the impact would be subtle.