SQ.
Exactly. The vibration never happened on the TV at all.
The projector and sub are on different surge protectors.

I dont know what else it could be....

The only other thing that is different is that the TV was a standard definition Toshiba rear projection. The projector is obviously 1080i and I am using faroujda upconversion on the HK AVR.

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Denon 4308
M80x2,VP150,EP600,4xQS8