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I just installed my kappas in the rears which aren't powered because the amp has not come in yet but here is the problem.

Everytime the sub hits, it moves the surrounding of the speaker and makes a sound like the coils are about to break off...

anyone have a clue what I could do? Could I get some dynamat and cover the coil so it doesn't do that?
 

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generally this is a problem if your whole trunk is sealed off with those 6x9's. Hence the reason i dont run 6x9's in the back and run 6.5's with a circular port on the side to allow the pressure from the sub to escape and not distort my rear fills.
 

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They make speaker cups to help protect the smaller speakers from mass air movement. Your local installer should have some or at least be able to order them.
 
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