Receiver: RXV650 or HTR-5760 http://www.yamaha.com/yec/products/receivers/RXV650.htm Center Channel: YAMAHA NSC444 http://www.yamaha.com/yec/products/speakers/NS_C444.htm From what I read...the receivers are both 8ohm...This speaker is 6ohm. If the receiver is properly vented, will this cause any problems to either the speaker or the receiver? Reorx