need help-how to build sound absorber, deffusive

Sean's advice is good, as usual, but I'd say it's imperative to read F. Alton Everest's "Sound Studio Construction on a Budget" (which covers all kinds of rooms, listening rooms in particular). He believes in diffusion, not only absorption, and that has worked beautifully for me. If you can go the DIY route, I have instructions for DIY RPG-style diffusors and Argent Room Lens copies that I could email or snail mail to you, but you'd need a table saw for either. But if you don't yet know what an RPG-style diffusor is, read Everest first. Jon Risch's bass trap looks trickier to make, to me, than a perforated panel absorber, details in Everest. You can turn your bad room into a good one, in all likelihood. Everest also shows you how to identify resonant modes that may need to be "trapped", minimized, by bass traps or panel absorbers. That book, like his 4th edition of "The Master Handbook of Acoustics" is must audiophile reading, IMHO.

Here's help:

http://www.decware.com/acintro.htm

Keep it simple...

Tom-
I have a table saw and other tools. I'm willing to try anything, but please try to keep it simple because I'm not great with following instructions!! Please email me at LTT142@aol.com. I appreciate the help. Thanks.
Lac

I agree with Tom on every count except for making Jon's bass traps. They really aren't that difficult.

A well balanced room is no different than a well balanced system. You can't concentrate on one aspect and neglect all of the others hoping that everything else will fall into place. As such, you need to use a little diffusion, a little absorption, etc... as the room and system needs it.

Keep in mind that two rooms of the same exact dimensions might be set up quite differently though. The overall layout and what is needed in terms of absorbers, diffraction, etc... will vary depending on the type of speakers, their placement and their type of radiation pattern.

With that understood, i once again stress that there is NO universal formula that will work in all situations ( just like speaker placement formulas ). Without personalized data on the specific situation, nobody can tell you how a room should be treated. Most of it will boil down to common sense and quite a bit of trial and error. Sean
>

Sean-
My room is rectangular-14'x24'x7.6" and my speakers are B&W N. 802. The speakers are 4' from behind wall, 3'from the side wall and 9' from listening, one wall has a window with with a curtain cover. The other wall leads into a hallway. There is a bay window behind listening. I tried to place the speakers farther away from the walls but the bass didn't get any better. Besides fiberglass instulation being used for sound absorbing and deffusive, is there any other material to use? Thanks.