I can look back there with my stereo on, and see it vibrating...a lot. It is destroying my sound. I dynamatted the metal shelf under it, but don't think it will work on the cardboard(ish) carpeted cover. What have you guys done to silence that?

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior