subwoofers are causing trunk to rattle...any suggestions?

[sgachko]

Hi guys, I just bought two JL 10W3v2's in JL's high-output box. The bass sounds great, but when I turn the volume up the trunk rattles quite a bit. If I have the trunk open there is no rattling. Does anyone know what I can do to minimize or eliminate the rattle?

Thanks in advance,
-Steve

[jamesr316]

open your trunk and the waves escape. keep it close they bounce all around. get some sound deadening in there.

[sgachko]

Would something like dynamat help? I had all of my audio equipment professionally installed. I'm not too familar on the process of sound deadening the trunk. My other obstacle is that my bmw is being leased. Does that limit me with options in terms of reducing the rattle?

Thanks again,
Steve

[FriedKalamari]

Would something like dynamat help? I had all of my audio equipment professionally installed. I'm not too familar on the process of sound deadening the trunk. My other obstacle is that my bmw is being leased. Does that limit me with options in terms of reducing the rattle?

Thanks again,
Steve

hmnmm i would discuss that with your dealership and ask them if its ok. Sound deadening would be extremely hard to remove if installed right, plus it would probably leave some residue. either way sound deadening is what will help dampen out the trunk to decrease rattling. Id talk with your dealership about it first.....? just a thought.

[haibane]

hmnmm i would discuss that with your dealership and ask them if its ok. Sound deadening would be extremely hard to remove if installed right, plus it would probably leave some residue. either way sound deadening is what will help dampen out the trunk to decrease rattling. Id talk with your dealership about it first.....? just a thought.

You guys do realize sound deadening is not made for getting rid of rattles. There are better products out there for that

[sgachko]

You guys do realize sound deadening is not made for getting rid of rattles. There are better products out there for that

haibane- what kind of products are you refering to?

[eric77]

hmnmm i would discuss that with your dealership and ask them if its ok. Sound deadening would be extremely hard to remove if installed right, plus it would probably leave some residue. either way sound deadening is what will help dampen out the trunk to decrease rattling. Id talk with your dealership about it first.....? just a thought.

Wouldnt the deadening material go under the carpet though? I mean, you would really have to be looking for it in order to find it.

[bimmer540wsubs]

Dynamat makes a kit specifically for the trunk, its kinda pricey though, and if thats a concern, eBay it up!!! but yeah i have the same rattle, its not a bad one tho i dont think, lets the people behind you know that youve got a kickass system!!!!!

[FriedKalamari]

Wouldnt the deadening material go under the carpet though? I mean, you would really have to be looking for it in order to find it.

yeah man thats why im sayin its just a thought but neither of us know for sure...

[Kingrye]

you might want to try baffleling like putting pading in areas that rattle. Like the egg shell bedding and stuff you use to sleep on when camping. this is easly removed or you can spray adhesive it for more permanet. this will absorb extra waves and give you a deeper sound. rattles are ususally cause of hallow areas between sheet metal where waves get trapped. one thing that is awsome is expanding foam but you can really mess up stuff with it. i used it in my maxima and the lock got stuck shut. but these are some ideas you might want to researh

[Ohtwo]

This is going to sound stupid, but go in the trunk, and find out exactly where its coming from. It will be alot easier and quicker if you know where its coming from.

[jamesr316]

You guys do realize sound deadening is not made for getting rid of rattles. There are better products out there for that

It would sure as hell help if not stop them. If its something like a brake lite rattling against a back window then it will not, but if deadener is installed, it will absord alot of the waves bouncing around, instead of redirecting them in another direction, potentially rattle spots.

[sgachko]

Thanks for the suggestions guys...I'm going to research how I would install the dynamat for the trunk. Does anyone have an idea how difficult a job this would be?

-Steve

[dave97m3]

I recommended to a friend the "Dynaliner" kit from Dynamat to eliminate noise in his trunk. This is a big sheet of 1/2 inch foam that can be applied underneath your carpet, trimmed to fit, and removed whenever you want. Also place some behind the carpet in both wheel-wells. 2 kits will be enough. The final result was a big thank you from my buddy who has 2 10's in a 740i. Good Luck!

[tplaya07]

Hey. I PM'd you about some left over deadener I have. I also wanted to ask if you had any speakers in the rear deck? If so, you could remove these speakers as to allow more bass to flow through into the cabin and not be trapped in the trunk, which should eliminate some of the rattle.

[Roffle Waffle]

The lock on my trunk rattles, wtf am I supposed to do about that?

[azvin]

you could always go overboard and do what i did.



but it's not really necessary. chances are there are only 1 or 2 things that are making all the noise. check the rear deck first. i've heard thats the worse spot.

[Quiksilver7]

Holy crap!!! That's insane!! it looks like the inside of a space shuttle or something

I think a rattling trunk is pretty "ghetto" myself... Most of the time it's the crappy cars around here that have the rattle in the trunk.

[ab325is]

i found that my license plate rattled and putting some deadener on the back of it silenced it. also my rear deck rattled. so i took it out and put 2 old tshirts underneath and that cleared it up.

you may have other spots though...

[sgachko]

hey guys- just to update everyone...I dynamatted the top part of the trunk (behind the drop down tool compartment) as well as stuffing some foam underneath the rear deck. The rattling is virtually gone from the inside of the car. I guess when you are running 2 JL 10's in a JL ported box you are still going to hear some rattling from the outside....it's still much much better than before.

Thanks for all the suggestions!

[FriedKalamari]

glad youre happy. getting rid of all rattles from the outside of the car is near impossible, there will always be some vibrations and flexing with high output subwoofer trunk setups

[R1OneWheel]

hey guys- just to update everyone...I dynamatted the top part of the trunk (behind the drop down tool compartment) as well as stuffing some foam underneath the rear deck. The rattling is virtually gone from the inside of the car. I guess when you are running 2 JL 10's in a JL ported box you are still going to hear some rattling from the outside....it's still much much better than before.

Thanks for all the suggestions!

Dynamat helps a lot. And listening to find the culprit.

[AuburnGrad323is]

I can't believe you said you had them professionally installed, and they did not offer Dynamat. I know many installers and that offer this up front to avoid the hassel of putting it in later. You should go talk to the installers and tell them this is something they should have recommended. Also, get it done soon, because the rattleing is just wearing away the paint somewhere. And it it is the trunk lid rattleing then you will see the wear marks over time.