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hi i am wondering if there is any cheap way to stop a bit of the vibration of my whole boot when turning up the sub... i currently have a 12' type R alpine sub, sounds awesome but i really really hate the rattle hearing from outside, its disgusting.. so just seeing if any of you guys could help me with this problem ... ohh i have a 05 civic sedan, when i turn it up... it sounds like there something loose in the tail left side... it seems like the rattle is coming from next to the spare tyre, but i could not find wat it was... im sure if i find out wat it is and fix it ... it will definately lower the amount of rattle

 
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Well I'm not really sure what you mean by "whole boot." However, you basically answered your own question. Find what's vibrating and either secure it or remove it.

 
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back in the day i had a problem like that. on the sides under the carpet there are little vents i am assuming to equalize pressure when you open windows and stuffs? but anywho tape those. i havent had any problems in two years.

 
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yeah, what "boot" are you talking about?

 
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boot is another term for trunk... but like darklegacy said just source it and secure or remove it...

 
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I've heard the term "boot" twice now within the last week and not knowing what was being talked about...

Taffy should post that same picture here too.. haha

 
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here ya go. i'll do it for him.

 
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Hahahaha Wow, I can't get enough of that! lol

Anyway, going off of what Powerwheels said.. speaking of which, I miss my Powerwheels.. I had a sweet monster truck when I was a kid.. Anyway, if you do mean the trunk, then there's basically nothing you can do except get rid of the system. There are sound DAMPING materials (not "dampening." You dampen a sponge.) out on the market which changes the Fs of your trunk, thus making it more difficult to vibrate. However, you will want to tighten anything you possibly can before going that route.

 
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May be U need Dyna mat something like that..

 
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I think his problem is something more than what Dynamat can do. Dynamat should be applied to secured surfaces. That would be like... if your jack wasn't secured to your trunk.. you just had it laying back there and you could hear it sliding/rolling around in your spare tire well.. "Oh let's just put Dynamat on it." I'm sure it the impacts wouldn't be as loud however.. it's not exactly the most intelligent fix.

 
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also, there should be bump stops on the lid of the boot which should screw out, and you can also adjust the clamp at the bottom, where the lid connects to, pull off the plastic portion above it, unscrew the two bolts holding it in, and simply slide it down. retighten bolts and rattle should be mostly gone, you cannot completely remove the rattle, but itll calm down. also consider dynamatting your liscence plate, should be able to get plate dynamat for like 15 bucks

 
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There are several things you can do to lessen the effects of the vibration/resonance you're hearing. You can't completely eliminate them, but it's possible to get the frequencies in which they vibrate either outside the speaker's range, or outside your hearing range. You can tighten the trunk latch, which closes the trunk a tad tighter and presses it down tighter on the weather stripping foam, lessening the rattle. You can adjust the bump stops on the trunk so it again tightens the seal. If you have a spoiler, you can install rubber washers onto all of the bolts at the point of contact to insulate them and lessen the rattle. Mat deaden the tag and isolate it from the trunk lid, again reducing vibration. You can mat deaden the trunk, effectively lowering the frequency in which it flexes and vibrates or resonates. Multiple layers further deadening it. You can also use liquid deadener to accomplish this. You can foam the trunk lid, isolating the skeletal frame from the lid, again reducing vibration. You can isolate the wires with the new deadener tape that's out preventing them from vibrating. As for the vents behind the wheel wells, when I still had my Civic, I completely removed them and then fiberglassed the openings with 4 layers of glass mat followed by 2 layers of weave then sanded them down and applied a layer of body filler to further smooth the panel to make deadening easier. Less is more with the filler. From there I matted over them when I matted the trunk with 3 layers of FatMat. It was effective in reducing the vibration. I also did all of the afore mentioned steps and reduced the rattle/resonance to a range outside my hearing capabilities. There is no way to totally eliminate rattle or resonance. We can only hope to get it outside of the audible range. There is no right or wrong way to go about it, just make sure you don't skimp on the methods you decide to use. Gary Biggs has even layered clay into several of his deadening processes. Find what works best and set out to make the resonance and rattle outside of the audible range.

EDIT: For the next post below mine the bolded statement is a better solution for the vent problem.

 
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the rattling next to your spare is an air vent. look to the left of your trunk under the carpet and you should see it. the vent has a flap and when the sub releases air it hits the flap, causing it to flutter making that annoying sound. DO NOT REMOVE IT unless you can cover the remaining hole up. if you remove it, your trunk WILL leak. mine was broken and still attached to the body and it leaked water for months and i couldnt figure out what was wrong with it. if anything, do what they said above, just tape it shut so it removes the fluttering noise...

 
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fix it yet? my bet is that its the rear deck where your rear speakers mount under. i stuck some paper towels in between the rear deck and the rear window and the rattle is gone.. you cant see the paper towels if you shove them far enough in.

 
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LOL boot in aussie terms means trunk... well i fixed half of the rattling, the brake light at the rear was hitting against the glass so i put a bit of rubber to stop that ... and now the only rattle is just next to the spare ... which eyeheartvtec has described here. it is a flap noise and kinda embarrasses me wen i pull up next to a car, with the subs pumping. will look into this 2mroow though... thx for the help heaps!

 
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cant go wrong with Dynamat. i know my buddy has a problem with that as hisbrake light is attached to the wing of the car. but otherwise dynamat is ur best bet and gives u a clean sound.