Rear wall treatment?

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nodiak

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Rear wall treatment?
« on: 23 Jan 2007, 09:43 pm »
Since at least a few of us are currently working on our rooms thought a thread on rear walls could help.
Any experiences with absorption and diffusion and combos of both?

My room is 11.5' x 7.5' x 26.5' with system on a short wall. So my rear wall is 11.5' wide, but in it's center is a 4' opening that drops down ~ 3' to a dining room. It's built with an (upside down) L shape at the top of the opening where the steps go down = the ceiling continues for 3' and then a 3' vertical wall down from the ceiling.
I'll be trying a curved reflector there (like ones I've mentioned in other threads for my side walls) and also a 24" x 48" x 5" thick absorber, to hear which works best. Either one will not cover the bottom 1' of the vertical part of the L to avoid being in the way.
Hope the description works.
Open to any comments of what treatment to use here. (I had originally chosen to use a skyline diffuser here, and made an 18" x 48" to fit horizontally. It's really heavy and here in earthquake country not such a brilliant plan to set it in a place we walk under dozens of times a day! So it'll end up elsewhere.)

For the corners of the rear wall I'm thinking a combination of diffusion and absorption. Probably absorption at ceiling tri corner, and diffusion (or reflector) mid way. Another fairly unique situation as the corners are closets, with doors removed. I've started putting loose fiberglass in thin garbage bags and filling up top half of the closets to absorb bass. Considering what to do with door openings on one closet. (The other closet has this computer station in it's bottom half, so no room for treatment).

Open to experiences and ideas as this evolves.

Don

AB

Re: Rear wall treatment?
« Reply #1 on: 23 Jan 2007, 10:39 pm »
So how far away from the rear wall is your listening position? Is the opening down to the dining room directly behind your listening chair?

nodiak

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Re: Rear wall treatment?
« Reply #2 on: 23 Jan 2007, 11:06 pm »
Speakers out 6' from front wall, listening seat 17.5' from front wall and 9' from rear wall. Opening is directly behind. The reflector I just put up noticeably sends music into dining room. Won't be able to discern what effect it's had on listening room for a day or so (life goings on).