I have a 1991 Chevy Cavalier I just put two Fosgate 10" Punch woofers in a box, and put it in my trunk. It sounds awesome (If your inside the car) I have put spray foam all over inside the trunk every little nook and cranny. I put Dynamat all in the trunk as well, but the vibration is sooo bad that I dont even want to turn it up!! Oh I also padded the license plate, at least that isnt vibrating anymore. What else can I do to stop the vibrating. Any suggestions would help. Im at a loss!! FROWN
Replies (4)
Victor on 06/1/2007 17:58:19
can you elaborate on the installation techniques you used while installing all this sound damping.. ??
Have u used the damping in the right spots??
What part of the car is vibrating and makin rattlin noises..??
Victor..
PS: Welcome to CK
Ash on 06/2/2007 18:28:38
Cavalier's have always had light weight trunks & lids with lack of sufficient (if any) damping material from the factory. More luxury type vehicles tend to have a lot of padding which makes them less susceptible to rattles. If your trunk isn't solid, it won't matter which way the box is facing, although some positions can make it worse.
In trunks like that of the cavalier, usually I attach the baffle of the box to the back of the seat (or front of the trunk) as if it is a "free air" (infinite baffle) setup. If ported, then the vent could extend through the deck as well.
If you can cut off any back waves you significantly reduce the amount of pressure in the trunk if there is any. Only a minute amount of damping material may be needed in the adjacent area of the baffle. Phasing also becomes less of an issue for the trunk is taken out of the mix for reverberation. All bass waves move forward into the cabin.
However, in your case, if you want to keep the box situated however it is, the only choice is to get out there, track down, and appropriately treat every rattle. It doesn't matter if you spray or lay everywhere. You've got to figure out while the music is playing, exactly where and what is it coming from. Only then can you figure out what else to use and where to put it.
Don't be naive to the fact that some solutions can be as simple as silicone caulking a panel joint/ crevice, or even neatly tucking rags in the culprit spot as well as using sheets in broad areas. Expanding foam can be of some use but, it can also be a disaster as it is very messy, unpredictable in it's expansion and sticks to everything! So be easy with it.
Check Partsexpress for some inexpensive damping materials that may apply to whatever application you need.
Ash,
Ender2 on 06/2/2007 18:33:27
I also experience this in my 1995 Camaro. The hatchback rattles rather fiercely even after taking off the interior paneling to the hatch and covering it in Rubberized undercoating.
The rear bumper also rattles terribly and my attempts to remove it failed horribly.
Ash on 06/2/2007 18:44:53
Getting rid of rattles is not an easy task. In fact it can be quite expensive at times in requiring numerous layers of material. If you ever read some posts all over the net, many who have already applied damping materials continued to find little nuiances especially after an subwoofer or mid bass upgrade.
One trick is not to install such SPL configurations, but I know no one likes that. The other is to add mass and lower the natural resonance of the affected area. Some have even added bondo to help stiffen an area. There's all sorts of tricks. You just gotta figure out what will it take to stop it, and hope it's not an expensive solution.
There is a price to pay for loudness beyond the factory setup or simple upgrade, as just when you think your done...... BAM! Here comes all the little things that wasn't included or rarely thought of. It's not uncommon, that's why you hear all these SPL rigs riding around sounding like there are hostages in the trunk trying to get out! They never figure it would be that way. Then again some actually like it?!!!!
Replies (4)
Victor on 06/1/2007 17:58:19
can you elaborate on the installation techniques you used while installing all this sound damping.. ??
Have u used the damping in the right spots??
What part of the car is vibrating and makin rattlin noises..??
Victor..
PS: Welcome to CK
Ash on 06/2/2007 18:28:38
Cavalier's have always had light weight trunks & lids with lack of sufficient (if any) damping material from the factory. More luxury type vehicles tend to have a lot of padding which makes them less susceptible to rattles. If your trunk isn't solid, it won't matter which way the box is facing, although some positions can make it worse.
In trunks like that of the cavalier, usually I attach the baffle of the box to the back of the seat (or front of the trunk) as if it is a "free air" (infinite baffle) setup. If ported, then the vent could extend through the deck as well.
If you can cut off any back waves you significantly reduce the amount of pressure in the trunk if there is any. Only a minute amount of damping material may be needed in the adjacent area of the baffle. Phasing also becomes less of an issue for the trunk is taken out of the mix for reverberation. All bass waves move forward into the cabin.
However, in your case, if you want to keep the box situated however it is, the only choice is to get out there, track down, and appropriately treat every rattle. It doesn't matter if you spray or lay everywhere. You've got to figure out while the music is playing, exactly where and what is it coming from. Only then can you figure out what else to use and where to put it.
Don't be naive to the fact that some solutions can be as simple as silicone caulking a panel joint/ crevice, or even neatly tucking rags in the culprit spot as well as using sheets in broad areas. Expanding foam can be of some use but, it can also be a disaster as it is very messy, unpredictable in it's expansion and sticks to everything! So be easy with it.
Check Partsexpress for some inexpensive damping materials that may apply to whatever application you need.
Ash,
Ender2 on 06/2/2007 18:33:27
I also experience this in my 1995 Camaro. The hatchback rattles rather fiercely even after taking off the interior paneling to the hatch and covering it in Rubberized undercoating.
The rear bumper also rattles terribly and my attempts to remove it failed horribly.
Ash on 06/2/2007 18:44:53
Getting rid of rattles is not an easy task. In fact it can be quite expensive at times in requiring numerous layers of material. If you ever read some posts all over the net, many who have already applied damping materials continued to find little nuiances especially after an subwoofer or mid bass upgrade.
One trick is not to install such SPL configurations, but I know no one likes that. The other is to add mass and lower the natural resonance of the affected area. Some have even added bondo to help stiffen an area. There's all sorts of tricks. You just gotta figure out what will it take to stop it, and hope it's not an expensive solution.
There is a price to pay for loudness beyond the factory setup or simple upgrade, as just when you think your done...... BAM! Here comes all the little things that wasn't included or rarely thought of. It's not uncommon, that's why you hear all these SPL rigs riding around sounding like there are hostages in the trunk trying to get out! They never figure it would be that way. Then again some actually like it?!!!!
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