First Thread.

[papmurph]

i used to have two 12 inch jl w3 and a phoenix gold 250x2 amp, but then my car rattled too much and it got very annoying.

[HandoEX]

papmurph wrote:
i used to have two 12 inch jl w3 and a phoenix gold 250x2 amp, but then my car rattled too much and it got very annoying.
Decent subs are always gonna rattle a car . Try using a sound deadener to clean it up. I found a Dynamat trunk kit on Ebay for 60 shipped and it has probably been the best car audio investment I have made.

[Guest]

Yeah, sound deadening material works wonders for rattles....but it adds weight. I kinda like the Cascade brand of liquid sound deadener, weighs less than conventional dynamat and works well.

[Guest]

liquid sound deadener works very well...

[amicheze]

i had a pretty decent system in my old car. nothing too fancy, but it pounded pretty well in an old grandmamobile. i kinda wish i still had it.. or at least the money for it.. cough

[Joel]

Read what it says in my previous post. "cheap and gets the job done" never said to use it in your award-winning evo or sti. it worked on the galant, and it never messed anything up. (that I noticed)

[24valvenotak]

mulitpurpose expanding foam is the worst product on the market today. I hope you didnt ruin anything by using it.

[King Ricer]

wannabe wrote:
multipurpose expanding foam. cheap and gets the job done.

damn ricer! i was into the car systems for awhile, but then now all i want is some nice componants and a good cd player and that will do me just fine.

[Guest]

I have to agree, expanding foam is not a very good thing to use for sound deadening and can wreak havoc on any panel you spray it behind. Stick to the tried and true methods joel.

[treimche]

I used to have a huge stereo in my old Oldsmobile back in high school. Then I transferred it to my 1G DSM when I had that. Since then haven't bothered much with it because my car is a huge bitch too, so when I get a truck or nice dd, then I'll consider some stereo again.

[24valvenotak]

tjamz wrote:
I have to agree, expanding foam is not a very good thing to use for sound deadening and can wreak havoc on any panel you spray it behind. Stick to the tried and true methods joel.

It is not a very good product to use on anything for that matter.

[LT1]

i love bumps, music aint the same w/out it

[TRE]

Expanding foam=no good

[Guest]

LT1 wrote:
i love bumps, music aint the same w/out it

no lie

[My NOva]

expanding foam does not work at all for sound dending unless its a full room and ur sealing the corners

[Guest]

My NOva wrote:
expanding foam does not work at all for sound dending unless its a full room and ur sealing the corners

actually, it kinda does work by applying pressure to a panel to keep it from rattling. But just spreading it on does nothing.

[24valvenotak]

...and you should be careful what it is you are applying it to. it has been known to break windows, door frames, and even heave foundations.

[Guest]

well sound only matters from the inside right forget the foam and jsut enjoy the musics....and a few bumps never hurts nothing

[My NOva]

tjamz wrote:
actually, it kinda does work by applying pressure to a panel to keep it from rattling. But just spreading it on does nothing.
my point exactly

[Guest]

Civic42 wrote:
well sound only matters from the inside right forget the foam and jsut enjoy the musics....and a few bumps never hurts nothing

While this is technically true that it only matters on the inside there is a huge advantage to reducing rattles since harmonics caused by rattles can in fact cancel out frequencies that you want to have playing. In fact, by applying dynamat or any other sound deadener (Roadkill, brownbread, Cascade, etc....) you can effectively quiet the interior to the point where it would be the rough equivalent of doubling your amplifier power. Its not uncommon to gain 3 decibels of sound pressure by stopping rattles...and 3 decibels is the same as doubling your amplifier power. Just to clarify, that does not mean it is twice as loud. You need to get 10 times the amplifier output (on the same number of speakers) to get twice as loud (10 decibels). In other words if you make 90dB at one watt w/ 2 watts of power you will only make 93 dB; w/ 10 watts you will make 100dB, w/ 100 watts you will make 110 dB; and w/ 1000 watts you will make 120 dB (and this is only in a perfect environment, usually you make less of a difference by going up in power by 10 times the normal amount...say 7-8dB for every time you increase power 10 times)