How do i stop my subs from rattling my trunk?

best plan tighten down. license plate, taillights, spoiler if have one. previous poster said, cars made soundproof on inside. replacing speaker has nothing rattling, though box design may creating air movement. have 2 10" speakers , had tighten down because dealerships don't. after repairs made. turn down bit. had friend same problem you. blew speakers.

see sound fine in car, when i'm in it. step out want turn off! rattles loudly, there besides getting new sub. have 2000 civic, 10" alpine. custom box.

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