Building bass traps???

Will this be effective for bass traps? If I glue/caulk 2"x2'x4' sheets of OC703 to a 1/4"x2'x4' MDF and then cover them in fabric? I could hang them on walls, across corners between walls, and corners between the ceiling and walls. Installing (caulking/sealing) bass traps to the walls is not practical in my case as I'm a renter. I read the sticky's but didn't see anything that would make this work or not work. Thanks Brian

Use Celotex with a wood frame. The MDF will reflect the waveform more than you would like when creating a hnging bass trap. I would do a 2x2 frame with the celotex in the middle sandwiched between the insulation Bryan Giles

Is the density of celotex really all that different than the rigid fiberglass? Should I instead just have the rigid fiberglass in a wood frame? Should I just have the rigid fiberglass on it's own?

Celotex won't work as well as rigid fiberglas - when mounting the fiberglass, the ONLY time it would be OK to put a panel on the back is if the fiberglass will be against a wall anyway - otherwise, the further you get the material away from a wall or ceiling, the lower frequency will be absorbed. This means open backs - but perimeter frames are OK - you can cover the fiberglass with cloth and leave the frame showing, or cover the entire thing depending on the look you're after. Just placing 3 or 4" rigid fiberglass by itself across a corner will help any room a lot. For free-standing units, have you looked here? http://www.johnlsayers.com/HR/index1.htm Hope that helped... Steve

I was recommending the Celotex in CONJUCTION with the Rigid Fiberglass INSULATION. :) Bryan Giles

Sorry Bryan, didn't catch that - should work pretty good. Newell seems to like using what I'd call a "gradual impedance" approach, where the absorption materials get gradually "harder" - your approach sound similar... Steve