I have also experienced excellent customer service when I found my 500's volume control to be intermittent, which made it impossible to dial in. I called Axiom explained my problem and no questions asked a new amp was sent out, shipped the old one back with no cost to me. I have never had anything go that eazy in my life!

Denon AVR-5800
Panasonic DMP-BD55
Axiom M80v2's
VP150
QS8's
EP500