Trunk deck lip rattles with subs

tilf_hunter · Mar 17, 2008, 12:42 PM

Does anyone have any issues with the trunk lid behind the back seats?

When I turn up my subs, the lid literally jumps 3 inches up and knocks against the back window. There's almost no point in turning the stereo up as the rattling is so loud...

Basically I'm hoping that someone has run into this before and have come up with some kind of fix....something to keep it from moving

I know there will always be some rattles with subs but this is unbearable.

Any ideas?

2006 ralliart

Thanks

mitsuboost30 · Mar 17, 2008, 12:44 PM

well thats what happends when u add bass to a car there buddy... things come loose and rattle..

tilf_hunter · Mar 17, 2008, 12:56 PM

Quote:

Originally Posted by mitsuboost30

well thats what happends when u add bass to a car there buddy... things come loose and rattle..

Thanks for nothing captain obvious....

Quote:

Originally Posted by tilf_hunter

I know there will always be some rattles with subs but this is unbearable.

MRadjahoe · Mar 17, 2008, 12:59 PM

Dynamat???

mitsuboost30 · Mar 17, 2008, 01:03 PM

Quote:

Originally Posted by MRadjahoe

Dynamat???

U GOT IT!!!!

Kurt · Mar 17, 2008, 01:46 PM

Turn it down a little. That always work.

Dynamat should do the trick.

Shinjo Yoshida · Mar 17, 2008, 02:27 PM

Dynamat is overpriced. Look into a product called damplifier by second skin. Good stuff.

**Myszkewicz** · Mar 17, 2008, 06:58 PM

I ordered a roll of B-Quiet a couple days ago. Very similar to Dynamat, less than half the price.

majestic* · Mar 21, 2008, 03:46 PM

Dynamat alone won't resolve this issue... there is too much of a gap between the carpeted deck lid and the actual metal rear deck of the car. Also, the carpeted rear deck panel doesn't really have anything solidly holding it down... hence the bass can move it quite a bit.

I have the exact same issue with my lancer too. I've got a Kaption 15" SPL sub in a 3cu. ft. box and it is annoying.

Turning down the sound is one option... but not acceptable... LOL

I've come up with an idea to resolve the rattling but I'm not sure as of yet how well it will work because I haven't gotten around to it yet. Just driving around with no rear deck LOL.

I was going to get some 1" foam material, and trace out the rear deck mat that is underneath the carpeted rear deck itself. Then either glue this to the bottom of the carpeted rear deck or just sandwich it between the metal of the rear deck and the carpeted rear deck panel.

I hope this makes sense...

blkbute · Mar 21, 2008, 06:14 PM

I made up some wedges and stuck them between the back window and deck along with the C pillars. Seems to have stopped the deck from moving, Some sound deadener would also help underneath the deck.

Jessie55 · Mar 22, 2008, 11:28 AM

i just stuffed some packing foam in there it seems to do the trick....i had the same issue as you before i would turn it up and it sounded like crap because of the vibration

robyn402 · Mar 22, 2008, 09:48 PM

yea i got this too, i wanna just take the shelf out and carpet the metal or something

BiCiRA · Mar 26, 2008, 08:55 AM

Quote:

Originally Posted by blkbute

I made up some wedges and stuck them between the back window and deck along with the C pillars. Seems to have stopped the deck from moving, Some sound deadener would also help underneath the deck.

that's whatI did too on my old Lancer and stopped the thing from jumpingup and down!!!
i think Dynamat could work but only over the top of the trunk, not on that lid...

Try wedging it like blkbute said and also add some foamy material below it!!!

tilf_hunter · Mar 26, 2008, 11:39 AM

thanks for the responses everyone.

Any suggestions on what to use for these "wedges"?

DangerousDan · Apr 3, 2008, 09:19 AM

foam should work fine, you could make molds and use the expanding stuff from Home Depot to make your own if you wanted

your displaced air is moving the deck, not the sound, so if you wanted to use dynamat you would need to cover all the holes too. it would work fine that way though