Thread: Bass Traps & Broadband Absorbers

This is somewhat of a continuation from this topic:
http://recording.org/ftopict-49853-.html

I've decided (in addition to possibly reorganizing the room) to build bass traps in each of the wall:wall and wall:ceiling corners.
They will be 24" front (OC703), framed w/ 2"x4"s and burlap.
I intend to throw the fiberglass roll behind the OC703 (corner is 15" deep after accounting for 2" panels).
Also, I plan to build 6 absorbers (2'x4') in a similar manner to the traps to place on the walls at major reflection points, and perhaps use 2 for ceiling clouds.

I can get the lumber and the cloth on the cheap, but getting the necessary panels of 703 (from online retailers) comes to over $500 w/ shipping. This is why I chose to do the 703 front / fiberglass roll for the bass traps instead of doing something like the superchunk method (solid 703 wedges stacked).

So here are my questions:
1. Does my use of treatments make sense?
2. I intend to build relatively temporary/movable treatments that can removed and resized to fit another space. Does that make sense?
3. How can I find a cheaper (local) source of 703? I've only found a couple of online retailers.

Much thanks in advance.

Side note:
Right now I'm deciding if I'm staying in the church or letting it go and building a space in the new house. That's the reason for the portability issues.
We're still shopping for houses, and I'm still deciding what I'll need to do (thanks to Rod's book) for my purposes.
Rest assured that when the time comes to build in the house (or improve the church), you'll know.


Ben

Thanks for the tips fellas.

I'm not sure if there have been tests done - I think I recall seeing something on Bob Gold's site?
Just found it. Here it is:
http://www.bobgolds.com/AbsorptionCoefficients.htm

Interestingly enough, the RWA45 is the only entry w/o coefficients.
Some of the better studios here in town use it extensively, according to Dave. Like Ultrasuede (used by their mastering engineer, Andrew ??) and Queen City Audio.
Dave also worked at Sound Images for awhile. Nicest place I've ever seen. Probably a million $+ just in building the space/acoustics (floating floors, diffusors/absorbers galore, all non-parallel surfaces, etc).

I'm still getting a bead on what the lumber will cost, so I'll research the Roxsul a little more in the meantime. As much as I respect DD as an engineer, I *would* like to have some numbers in front of me.