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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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Re: Absorption suggestions

Posted by Angus Mitchell on December 30, 2002 at 20:51:25:
There are two things you need to do here, psychobabble.
You need to isolate the speaker from the entertainment center. The lower frequencies travel through the speaker box into the entertainment center, which I'm assuming has a decent amount of surface area, which allows these low frequency vibrations to be more efficiently coupled to the air and will be louder. You could try different types of isolation, depending on many different factors (speaker weight, available space in the EC, etc.). Some of the easiest would be basic foam rubber. This would work great so long as your speakers aren't too heavy. This foam rubber could also address the other problem, which I will get to soon. Rubbery mounts might be effective; something such as vibrapods, or even cheap vinyl grommets you can get at Radio Shack. "Dry foam" (the green brittle foam used for floral arrangements) can work nicely, provided you have the space for it.
The next problem you need to address would be the horn effect you are getting from having your speakers in the EC. This could be done by placing some sort of damping material in there, like foam rubber, surrounding the entire speaker. A less dense material such as polyester batting, which is often used for sound absorption, probably wouldn't be as effective because it's not as good for low frequencies, unless maybe you crammed it in there really good.
The aforementioned suggestions should all be relatively cheap and easy, so I hope this helps!
AM