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Acoustic Treatment on rear wall

First of all, I don't have a state of the art home theater system. It is one I built myself and I think it does fairly well for a budget system. Currently, I have most of the corner issues addressed with either book shelves or plants. I don't have a problem with the bass. The first reflection points are either addressed with an open door on one side and a coat rack on the other.

However, I would like to address reflection off the wall behind the couch where I sit. I am a few feet away from the rear wall and I would like to put some kind of diffusion on that wall. The question is how many panels? I thought I would put up a 24 X 48 x 4 panel. Would that be enough for at least some kind of diffusion from behind?
matchstikman
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ncarv
983 posts
 
If there is room behind the couch, more books or records on shelves might do the trick.
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stanwal
3,147 posts
 
I don't think you need 4" panels behind you. They are mostly for treating bass problems. I would use 2" and a couple at least rather than one.
rockadanny
1,226 posts
 
I have a wall behind me like you. I have used a couple of GIK 244 bass trap panels (2'x4'x4") on the wall directly behind my head to eliminate the bass null caused by the wall. Works very well. If you are near Atlanta you can borrow mine to try.
rrog
1,958 posts
 
Look on the ASC (Acoustic Sciences) website. I have used 8 of the 9"x 36" tube trap half rounds behind the listening position with excellent results. ASC also offers the Matrixpanel for this purpose. The Matrixpanels come in two sizes, 24"x24" and 24"x48". If you decide to make panels yourself make sure you use only natural materials. Synthetic materials will cause a frequency imbalance.
buconero117
2,311 posts
 
a single Echo Buster, about 48x4 should do the trick.
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