Still in planning stages of home theater room

[GMorris]

I'm still in planning stages for a home theater design and was hoping to get some input on a couple of ideas:

1. Planning on having a 5-6' tall 18" diameter sonosub in corners to the left and right of projector screen. My idea that I have not seen done anywhere (not that it hasn't been done) is to wrap the sonosubs in 4" fiberglass so that it will double as a bass trap. Endcaps will also extend 4" out from sonotube. Still haven't figured what to cover the fiberglass with though. Good idea/bad idea? Might as well?

2. Room will be in an unfinished basement. Portions of the to-be-built wall will have fabric surface with 6" of fiberglass behind to absorb reflections. I'm also thinking a speaker with baffle-step compensation could be placed closer to this fabric wall than a normal one...correct? Does anyone know how sound absorbing material affects bsc? Could I potentially even recess the speaker a bit if it is surrounded by enough fiberglass?

Thanks for any thoughts,

Greg

[ThomasW]

They won't work as bass traps since traps need to be hollow. 4" of damping isn't thick enough to absorb any bass.

[GMorris]

So just leave the fiberglass off the tube and put it in the corner?

[dyazdani]

So just leave the fiberglass off the tube and put it in the corner?

The corner IS a good place to put a bass trap, but a sonotube wrapped in fiberglass won't work as a bass trap.

You could leave some space for a bass trap in the corner and put your sub a little inward if you want. That's what I did, though I don't have any sonotube subs.

[ThomasW]

If you've seen the sand filled so called bass trap on the DIYnetwork, that's not a bass trap. That's a diffuser regardless of what they call it.

Corner bass traps are usually thick, mine are 1/4th wire mesh cylinders filled with fiberglass. The radius of the cylinder is 24"

Here's a link to get you started

http://home.comcast.net/~thomasw-2/SubwooferSetupandEQpage9.html

[Jim Griffin]

Planning Home Theater

Greg,

I would suggest that you read Earl Geddes' "Premium Home Theater" book (www.gedlee.com) which summarizes what needs to be done in building a home theater.

Jim