Hi there, I just setup my new sound system last night. During testing of 'the dark knight' my receiver just shut off. I'm not sure what could cause something like this. I have all pretty much low end equipment, but didn't think that should be the cause of the problem. Sony STR-DH520 Polk Monitor 30 (front), CS1 (center), OWM3 (rears), and PSW10. Sounded good, but I turned the volume up and after about 5 minutes the receiver just shut down. I didn't try to trouble-shoot it because I don't know what would cause that to happen. I'm using large wire - 12 gauge. It was difficult getting the cables into the speaker ports on the receiver. They have the spring type connector. Could a bad connection cause something like this? What would you do here? I just moved into a new house, so I can't just upgrade the unit. Thanks,