Sound proofing is absolutely essential! and yet most car audio places don't promote it.
Dynamat shows all over their website how a bit of soundproofing will give you at least a 3db gain. Big deal you say that doesn't sound much. In order to get a 3db gain out of your car sound system you would need to double the amplification. That would cost a lot more than a bit of sound proofing (check out how much a 600W RMS amp costs compared to a 300W RMS amp to get an idea).
Cinemas and sound studios all have sound proofing. A car needs it even more because you have engine, road, tyre noise as well as vibrations all competeing against your attempts to listen to a CD. Your speakers are mounted in tin can doors. Dynamat uses a couple of speakers mounted in garbage cans to illustrate the point.
Speakers travel backwards and forwards in order to make sound. You only want the sound to come forwards because that is where your ears are.
In order to do things right you need to seal the speakers into the doors. This requires a layer of soundproofing both against the outside of the door (stuck to the inside of the metal) and on the inside of the plastic door panel and a diffussor panel behind the speaker itself to reduce backwave distortion. This will give you some serious bass out of your door speakers and make a cheaper speaker often sound a hell of a lot better than a more expensive speaker.
Those top competition cars you see are chockers full of sound proofing yet the places that do those show cars often won't put a single piece of soundproofing into their regular customers rides.
I know if I pay good money for nice audio components I want my full monies worth out of them and without soundproofing your getting less than half their potential.
Note: I've only used Dynamat as an example there are heaps of other great brands of soundproofing out there including G-Spot and Stinger Road Kill.
Why car audio sound deadening is essential
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16 January 2007
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