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I am sure everyone knows why people use styrofoam peanuts for shipping...Exactly...it helps in preventing damage. Well the next time you get your hands on a few of them LIKE HERE, pull back the carpeting in your trunk (where you did when you installed your teeza lights) and pour a hefty amount in the cracks and crevices. This acts like a barrier between the road and your trunk. It most importantly creates a dense sound wall that can "trick" your speakers in to thinking they are in a tighter enclosure. Hense tighter bass. I used to instal sound proofing in buildings for recording. One of the biggest things they poured in between the drywall was peanuts. Another good hint is to go to a craft store like Michaels and purchas polyfoam stuffing. Its CHEAP...anyways, put a good amt in your speaker enclosure. This also "tricks" your speaker. This does not work with bandpass boxes...only sealed...just thought you guys would like some tighter bass....have fun with the peanuts...they tend to be messy.....

 
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Foam does not "trick your speakers into sounding tighter..it fills space and reduces the enclosures effective size..

Your thinking Polyfill(Pillow Fluff) that causes the air to travel around the fibers and therefore travel further, thus fooling your subs into thinking their in a larger enclosure for purposes of low end extension..the beauty is it doesn not affect "tightness"..Just low end response... as far as the peanuts between the drywall.. that's not a good sound insulator.. a Good insolator would have to be dense and somewhat soft for good absorption.. they stuff it in the walls because a) It's easy al all hell B) Fast to do C) CHeaper than dirt..and it's a very good THERMAL Insulator..

I'm not flaming you..I'm just tired..I Always sound like an a$$ when I'm sleepy..Please do a little research before you post something this and has someone with a peanut filled car [IMG]i/expressions/laugh2.gif[/IMG][IMG]i/expressions/laugh2.gif[/IMG]

It will work well filling between cracks if it's firmly stuffed in though..

Cheers
Mohawk

 
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ah yes the peanuts...
yeah if you're building a sound studio they tend to use that..but that's cuz you're building a "floating room" and to fill in between you "can" use foam peanuts and many do..you don't want anything solid/tight packed as suggested by mohawk....cuz then it would defeat the purpose of your floating and sound proof room.


however when it comes to cars...it's totally different arena...and mohawk nails the point to a T... it's definitely polyfill that you're thinking of and mohawk explains it perfectly.

 
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guys a cheap and easy way to get a cleaner sound is to go to the home depot or lowes and buy a roll of sound insulation...Cheaper than dynomat and it work better...just roll back you truck carpet and stuff it in the rattles go away and the bass hit much cleaner

 
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Polyfill or polly foam....Both are a fiber like fill that is used to stuff pillows in such with. As I was saying..... In COLLEGE, while studying for my MAJOR, I learned several things in my Engineering class about the principles of sound. I not only learned that putting peanuts in side of walls dampens noise obstruction but also eliminates sound from penetrating a given area in relation to the composition of the wall its being added to. I misworded my previous post in saying that the peanuts would trick the speakers, and i take that back.. The polyfill-polyfoam added to the speaker enclosure does tric the speaker in to thinking its in a tighter encloure like so SHOWN HERE....The peanuts in the rear of your car provide that sound barrier between your cars trunk and the street. Just think about the sound waves of your speaker going through the carpet of your trunk and hitting the steel of your car....it them bounces in multiple directions, added with road noise...now think about the sound bouncing off of the carpet and back into the cabin of the car b/c the styrofoam created that barrier. Now with no road noise, your spl is increaded, maybe not so much to the human ear, but put an SPL meter in the front seat and see what your results are.....I only say this b/c i had significant results from polyfoam in my enclosure and styrofoam through out the trunk of my car. I tested w/ and i tested w/o....and the results proved that my professor in college as well as my boss at Sound Designs ltd. were correct in their philosphy on sound......