Hi, I have a 5.1 Channel System. 2 Aperion 633-T's as my front, a center, a sub, and 2 surrounds. I have a 7.1 Channel Pioneer Receiver that puts out 110 Watts/Channel at 8 Ohms. I feel as though this isn't enough power for the Aperion Speakers. I can raise the volume from -40 to -20 on the receiver with very little change in volume level. ...