Hey,

I've got a couple 12" subs in my trunk. When my system's on, the vibrations from the subs cause a pretty loud vibration in my trunk that's kind of annoying. Understandably there's going to be some vibrations and shaking, but this is pretty damn loud, especially compared with other systems I've heard. Is there something in particular that's probably rattling? Is there something I can fix/tighten/improve to decrease this sound?

Thanks for any help.

jh

 

There are sound dampening procucts like DYNOMAT and TSUNAMI Silcencer Kit. They are pretty expensive in my opinion. But they definatly will reduce the rattle in your trunk. However keep in mind that that rattling your trunk is doing is exactly how much your ear drum is rattling as well.. In my opinion i would sell the sub system save my hearing and make some sick mod with the money

But that dynomat can be purcahsed at any audio store (circuit city, best buy) Hope that helps dude

 

as far as i know... there is no way to get all the rattle out...

ive dynomatted my trunk w/ only 1 layer, and i can tell a bit of difference but there is still alot there

now i really don't care.... it sounds good on the inside of the car, and thats all that counts.. you didn't buy it for other people to hear did you?


btw wrong forum?

 

I got 1 12" cerwin vega and I cant get it stop rattling, It comes mostly from the spoiler. It came stock on my SE, if I put it up to 1/4 volume, and go out and hold the spoiler up with 2 fingers, more than half of the rattling goes away and the rest comes from the lisense plate. and one day i was really bored, wait until a heavy bassline comes, and pause the song, and u hear the vibration from the tension bars from inside the trunk, what can i say, i was bored.

 

HAAAAAAA!!!! I compleatly stopped it when I had my system in. First went on a nise layer of dynomat, then, my mom was having problems with her new couch. Since it was under warenty the company sent someone over, and they replaced the coushons. Anyway I had two nice pieces of "foam stuff", and procede to cut it and stuff my trunk. worked awsome. just had a slight rattle from the licence plate.

Now when you start ripping your couches apart you can tell your family it was my fault.

Ohh and I had two 12 inch sony explodes, but I got rid of them, cause I wanted a faster car, not a loud one.

 

To fix the rattle from your license plate, take a sponge, cut it into a piece to fit your license plate, then screw the plates in.... that will hold the sponge, and problem solved... I know its ghetto...but it gets the job done

 

eDead v3
http://www.edesignaudio.com

and check http://www.caraudioforum.com there is a GD going on.

 

You could also try Peel n Seal. It can be found at Lowe's. I have yet to apply it to this car since I just got it a couple of weeks ago. This car rattles a hell of lot more than my old car.

 

I have eliminated some of the rattle from my trunk, but not all. You'll probably need to dynamat some of the floor of the trunk and the two rear fenders to start.

Once that's done, I think the next step is the trunk lid. The spoiler rattles, but my new theory is that a bunch of the rattling is actually coming from the back of the trunk lid. I dynamatted the top of the lid (2 layers of ultra in the triangles), but still have to try the back. I would probably put some dynamat on the inner and outer parts of the back of the trunk lid. I am wondering if that's where dude stuffed the pillows? Seems like it might be a good idea since dynamatting in there will be a major PITA. I might try just stuffing some pillows or foam in there this weekend to see if it helps...if it saves me from having to dynamat in there it's def worth it.

Definitely do the license plate as well. Dynamat has a kit but foam or a sponge or whatever will probably work too. The license plate really rattles like a *****!

Once all of that's done, if it's still rattling I think the rear bumper may be part of the problem...maybe take the bumper cover off and see what's what.

 

like someone stated earlier, once your system becomes so powerful there is no way to eliminate all of the rattles (this is the price you pay for a spl system). the harder you try to fix the rattles, the more stuff you start breaking. so if the rattle is not that bad and you've already tightened your spoiler and put on 2 layers of dynomat then i would say thats all you can do.

me personally, my trunk actually flexes, bends, and tries to come open with my competition system. ive already broke the welds or rivets that hold the trunk latch to the bottom of the trunk, ive broke the power antenna, ive broke tailight bulbs, and not to mention busted every last pair of 6.5's that have resided in the rear deck. so in conclusion be ready to replace things the harder you try

 

I like a system too, but why would you want to take your spare out of the car and have the possibility of being stranded somewhere? I just don't understand that?

 

If you are trying to stop rattles Dynomat is not the answer. Dynomat is a sound dampener. It is designed to make the metal body of your car stop resonating and canceling out the sound waves produced by your speakers, creating better sound quality.

Of course if you were to Dynomat over a bolt or harness that was rattling it would stop the rattle but a little bit of foam and duct tape could do the same thing and at a much lower cost. Like 96maxdaddy said a little couch stuffing fixed his rattles.

Also once you have located all the stuff that is rattling and stuffed foam in it or whatever another major source of rattles in more powerful systems is caused by the rubber weather stripping around the truck flapping against the metal when the subs hit and air pressure tries to escape. What I did to stop this on my previous car was to spray glue thin black felt around the area where the weather-stripping made contact with the trunk lid, but be careful in some cars this will cause your trunk to leak.

 

like stated before if you have a powerful system you will never stop all the rattles, you may silence the ones for now but more will pop up in their place very quickly. trust me, when i installed my comp system i tried to get all of the rattles to stop. with all of the power i'm running i finally faced the fact that it would sound like 2 gorillas are trying to get out of my trunk. so either go with a wimpy system or live with the rattles.

p.s. ( dynamat does really stop rattles )

also to Brudaddy: my spare tire rides behind my drivers seat resting on the floor leaning against the backseat

 

What you need is a JL Audio stealthbox! For some reason the one for the 4th gen isn't showing on JL's site right now, but basically it is a fiberglass sub enclosure that is molded to fit in the space between the driver rear fender and the back of the trunk. I have had people that know car stereo look in my trunk and they can't even tell where the sub is! Doesn't take up a lot of space, doesn't take up the spare tire well, doesn't block the pass through.

It's not 2 12"'s, but for a single 300w 10" sub it POUNDS...more than enough for me.

It really is a great setup for peopl who aren't doing stereo **** as 100% of what they do with their car or don't want to sacriofice the room.

 

This is not 100% correct. You're right about all the stuff you say can cause rattles, but panels can rattle too and Dynamat *definitely* works to eliminate those rattles. At least with the 4th gen, dynamatting panels alone probably won't do it, but panels definitely do rattle and can benefit from Dynamat. A pleasent side effect is what you mention about frequencies and better sound.

EDIT: One piece of evidence for this is that my **** still rattles with the trunk open which pretty much eliminates the seals and wires and even the trunk lid. The trunk open rattle has been significantly reduced by dynamatting.

 

I don't mean to argue since you obviously know way more about car stereo than I, and I am sure that you are 100% right if you are talking about an SPL system...however...

For a more normal everyday system it is definitely possible to eliminate every single rattle. It might not be *in some cars* (the 4th gen being an excellent example of one where it's nearly impossible to stop them all) but a blanket statement that you can never eliminate all rattles is incorrect. At the last meet one dude had an Avalon with 2 12"s in the back and doors open or closed there was not a single rattle coming from the car. It was very very impressive...

 

WTF!
Id never do that. I couldnt see myself driving around with a dirty ol spare tire just chillin in the back leaning against the back seat. That would look too trashy to me.
I'll keep it in the trunk where it belongs.

 

sorry bout the generalized statement, but i totally agree with you endus about everyday systems. been doin car audio for so long every time i hear about a system i think about it from a SPL stand point.

FLAVOR247
WTF, for starters my spare tire is washed, and inside a circular leather bag, and with my seat reclined you barely can see the top of it.(i said on the floor leaning against the backseat) if i build a system i go to the extreme or nothing at all. thats why there is a 12 cubic foot box in my trunk along all the amps, batteries, and other accessories

p.s. FLAVOR247 I also keep things where they belong, and subwoofers belong in the entire trunk, the spare tire goes somewhere else where i can stuff it

 

Haha, that's gangsta!

 

My bad, Like I said, "I" coudlnt do that. I like to keep the inside of my car empty. Only thing that I have inside is my cd's and their in a book under my seat.
Post pics of you setup. It sounds nice.

 

I avoided dealing with truck rattles in my maxima by building a single 12" box That sealed to the rear seat pass through. Then I pulled out the rear seat and dynamated the entire metal panel from the rear deck to the bottom of the seat to seal off the trunk keeping the bass and pressure in the car. The sub is an Image dynamics ID MAX and to power it I am running a Phoenix Gold zx600ti in 2 ohms (about 1200 watts). It hits hard and there is not a single rattle even with the car all closed up. Suprisingly it even sounds good with the center arm rest thing folded up.