Maybe the different crossover is putting more power to the tweeter on M3 and overdriving it ?

Or just a bad driver; can you check one channel at a time ?

+1 for the "M3s normally sound a bit more mellow / laid-back / smoother than M22s" opinion.

Last edited by bridgman; 03/16/09 08:47 PM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8