Regiroy,
I got your private email but I'm going to answer you here so that others may benefit. All the advice so far is excellent.
I'd also suggest you be sure the Pioneer is set to 8 ohms (not 6 ohms, not 4 ohms). I'm sure the Pioneers give you that option, and if you chose 6 ohms, it would limit the Pioneer's power output (current limiting), which would account for the lack of volume.
It's certainly not the speakers. The M60s are quite sensitive and should play very loud on relatively little power.
Also, turn off any auto-EQ or auto-setup circuits and do a manual setup for levels with each speaker. I'm almost certain that's where your problem lies.
Regards,
