Sound deadening in box?

[kramer_212 10+ year member]

has anybody ever tried it? i pulled out my box for some tlc, and since im sound-deadening my trunk while everything is out, should i sound-deaden the inside of my woofer box,

the real question is will i gain (or loose) spl/SQ

thanks

Click to read more...

 

[UnderFire 10+ year member]

Don't trust me on this, but I do believe that the only thing that would happen is you'd lose quite a bit of volume, I don't think you would gain anything.

 

[kramer_212 10+ year member]

oh fudge sticks.

 

[Fiendstolemyamp 10+ year member]

It's not needed.

 

[UnderFire 10+ year member]

oh fudge sticks.

If you want to gain volume, I've used polyfill to do that in smaller spaces, so if the box is too small for the sub, you could gain some sound, but if your box is already built to spec, I would just go back around the edges with silicone caulk and "freshen" it up a bit, otherwise with the trunk deadened you should hear it better as well.

 

[KyleBechtold 5,000+ posts]

Don't trust me on this, but I do believe that the only thing that would happen is you'd lose quite a bit of volume, I don't think you would gain anything.

quite a bit? how thick do you think sound deadener is?

 

[Phoenix Risen 10+ year member]

underfire... how much experience do you actually have in car audio.

op. dont do it. its a waste of time and your not going to gain anything from it.

is there some issue that was making you think about doing this or just an oddball thought?

 

[Kangaroux 5,000+ posts]

OP the most you can do to the inside of your box is add in like fiber glass to help strengthen it. Deadener is just for getting rid of rattles not to make something more rigid, per-say.

 

[CHEMMINS 10+ year member]

Now if it is a fiberglass form box, it will help with resonance on the glass.

 

[UnderFire 10+ year member]

underfire... how much experience do you actually have in car audio.

About six months, that's why I said not to trust me. but I've built about 10 boxes so far and none of them fell apart yet, so I guess I'm doing well.

 

[Moble Enclosurs 10+ year member]

Sound proofing the interior of an enclosure is like using an airconditioner for just the "fan only" setting. It will not hurt the enclosure, but it will affect the output. Though you do not want many resonances inside an enclosure, its inevitable. The best way to increase the sound intensity is by minimizing folds in the design, but sound deadener is not the answer.

 

[basscort2009 5,000+ posts]

All these answer are most likely just guesses. i speak from experiance when i say the only thing you will gain is a few tenths on the meter, and thats ONLY if its done perfect and super smooth. some of the usaci world champions have done it and max gain i have seen is .5 dbs. So if your chasing numbers then do it. otherwise its just a PITA

 

[Moble Enclosurs 10+ year member]

All these answer are most likely just guesses. i speak from experiance when i say the only thing you will gain is a few tenths on the meter, and thats ONLY if its done perfect and super smooth. some of the usaci world champions have done it and max gain i have seen is .5 dbs. So if your chasing numbers then do it. otherwise its just a PITA

Somewhat agreed. Panel resonances tend to smooth out a resonse curve, so if you are looking for less panel resonance, then yes, by eliminating it you will gain numbers, but bracing is more efficient for that purpose. With a large enough enclosure, both could be utilized, but if the sole purpose is for audible experience, which music is intended for, then it would do nothing but cost time and money. For that small of a gain when the purpose may be for that extra "loudness" then its not worth looking into it. For dB comps, when audible experience is null, then by all means. But weigh the options and cons/pros first. Having a **** box and wanting to put this in it will not be worth it. Having a specifically design enclosure matching all aspects of the competition as well as possible, maybe.

 

[100%Awesome]

I would also be willing to almost bet that doing a nice smooth well done layer of resin on the inside of that box will do far more than deadening. Like Moble said though, nothing is a replacement for good bracing. Dont try to hide a problem if you can solve it. If you are trying to just "improve your sound" you most likely wouldnt notice anything.

 

[kramer_212 10+ year member]

it was just a thought, but im just going to "freshen" her up, and leave the sound deadening to the trunk.

thanks for the imput.