Ok, after looking at the threads above and what you have said, I went down and took the driver out. It is definitely the driver. If I push in on the woofer manually, there is a clicking sound (kind of like those clicker toys we had as kids). It happens with every press of the woofer repeatedly. Not sure what would cause this. At this point, I would assume I need to engage Axiom about it and see what they say unless you guys have any other ideas.

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