It seems like it's coming from the driver. When I first heard it from the DVE tests, I took the front off and could see the driver head and it looked as if it was rattling against the back of the driver due to the amount of movement.

I'll try shoring up the screws, but I don't think that's the issue. But you never know. :-)

Mitsubishi 62" DLP Pioneer VSX-84TXSi SA 8300HD XBOX 360 Axiom Epic 80.500 7.1 Speakers