New Powerful Subs installed Too Much Trunk Rattle

03-19-2016, 07:41 AM
Hi welcome everybody to my thread. Ok so today i have just installed my new car subs into my i.mpreza. They sound good inside the car, but outside there is a bunch of annoying trunk rattle. I had tried tightening the number plate but its not doing anything. I think its because each sub is pushing 1500 rms and they are 12s its hard not to avoid this problem.

Now i have done some reading and found this website have a look car audio stop trunk rattle ( I only just discovered that there is something called dynomat, this silverly peel on thing. My question is it worth the money does it really work. I never looked into sound deading until today when i took a massive jump of power from a cheap 300 watt sub.

So people all suggestions and opinions would be helpful and thanks in advance.

03-21-2016, 08:15 AM
Yes the dynamat type stuff works ... go here to read about it

03-09-2017, 10:34 AM
Quick question. Is any member a secondskin dealer or reseller? Or can anyone point me in the right direction on where to purchase for a good price (besides directly from secondskin)? I am looking to purchase around 100sq ft. of Damplifier Pro. I am doing my FD3S. Thanks.

04-04-2017, 09:57 PM
Before you throw $100's into dynomat ( which works vary well for sound deadening) try lowering the catch latch on the trunk to make it tighter to the weather striping. Also I have used cheap rubber under coat spray and roll on bed liner as sound deading before and both work surprisingly well. Also alot cheaper than shiny dynomat.

04-12-2017, 08:18 AM
the spray on only does so much, you need mass to change the resonant freq of the offending panel.

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