How to make Sound Deadener?

yeah you dish out hundreds, maybe thousands for dynamat, or search ebay for slightly less expensive stuff that is probably just as good. 99 Blazer LT.   Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)

Basicly consists of asphalt, rubber type material, aluminum cover, or a combination of all of them.  Basicly, you can find a less expensive way that works for you, or spend about 120% of your audio budget on deadeningGovenor of Jimcinati

93' GMC Safari XT

is your goal to reduce road noise, panel vibrations or both? as a general rule increasing mass lowers resonant frequency, as does increasing rigidity of panels. ensuring your weatherstripping is in good shape will help with road noise.

you can go to your local home depo or lowes. they have this stuff that they use on your air conditioning lines so they reduce moister. its like a tar like matrial. its very cheap and does the job great. i have a 03 durango and i used it on my roof and back panals and it works like a dream. huge difference. i think i paid like 70 bucks for everything. deff try that before spending an arm and leg on dynamat. theres this other stuff called b-quite you can find it on ebay its real cheap to and its the same stuff.6 memphis PR 15's sealed enclosure. indash mobile video system. alphasonik HC800PMA 3000 rms

MECP first class installer

Spray on truck bed lining works very well.Big Dave

jl_jeep19, if you were capable of manufacturing your own you wouldn't be asking how to do it on an internet forum.  Buy it like everybody else does.Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

I would agree, people have been using 'peel'n seal' forever. Moat of that stuff will do the trick. Dynamat is nice, but for the money it's a little overboard.

get a job at best buy, employee discount for dynamat is amazing...jl audio..nuff said

yea it is. i do the in the mobile install at best ive been there for 3 years and for a x-threme bulk pack its only like 34.87 when normaly its 93.99. but if you dont want to go that route then go on ebay and type in dynamat and get this stuff called b- quite it works like a charm. just make sure yo uhave a heat gun 6 memphis PR 15's sealed enclosure. indash mobile video system. alphasonik HC800PMA 3000 rms

MECP first class installer