Have any of you had problems with a vibrating noise coming from a QS8?

I have a sidewall mounted QS8, and only the left one, vibrates like crazy during bass heaving scenes, just watched Spidey 2 last night, and every time doc oc walks around, the stupid thing vibrates BADLY, I took all of the grills off except the top one (couldn't get a good grip on it). Have any of you experienced a vibrating QS8?

I am going to have to get that top grill off the speaker and see if that is the part that is vibrating...if so, what can I do to reduce vibrations from the grills?


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