Tips or on eliminating unwanted vibration

[JohnnyAppleseed]

I am planing to make a custom fiberglass sub enclosure. For a sub on each side of the trunk. I have a friend that has a nice looking setup, but once your in the car playing it, everything sounds awful, all you hear from his subs is the trunk popping and bouncing off everything. I don't want mine to sound like his are there any tips dealing with sub angles and placement, or any products to help with the problem? Thanks for reading

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[sqoverspl 10+ year member]

read about sound deadening, and look up sound deadener showdown

 

[whitedragon551 5,000+ posts]

read about sound deadening, and look up sound deadener showdown

Or the cheaper equal alternative Second Skin.

 

[michaellane 5,000+ posts]

or dont buy subs...i cant hear my trunk inside my car