Very ODD Ctrl.Room Treatment HELP 9' X 14'...

Hi, I know there is some sound gurus here and I would need a little help please. Here is my ctrl Room. Its a 9' by 14' feet room with a pretty funky shape. The ceiling is 8' high in the front part and 10' at the rear. And I was wondering How I could make it sound good. I tried to deaden the front wall from 3' high to 6' High, and partly deaden the rear wall with a checker pattern but I founf the rrom to sound odd around the lower mids. What kind of sound treatment should I use in such a round? The monitors are 45" high on stands. The desk is 34" high. There is 2 window on both side of the room. A bent double glass booth window left from the desk and an outdoor window right from the desk. Floor is live with wood, and ceiling is a floting type (real ceiling height is 11'). See this topic for pics : http://johnlsayers.com/phpBB2/viewtopic.php?t=7754&start=15 As You can see it is wider than deep, so from the start I'm breaking a rule. What sould I use for axial treatment? absorber or difussor? Bass traps :?: Thank you! :wink:

Ntchi wrote:

What kind of sound treatment should I use in such a round?

Probably as much as possible. :) > What sould I use for axial treatment? absorber or difussor? Bass traps :?: < Yes, bass traps. And as many as you can possibly manage. Not just in the corners, but all over the wall behind you too. --Ethan

By all the walls, u mean 360? Bass traps even on the front wall? and Sides walls? and ceiling? I have Roxul and Sonopan in my basement. What If I build frames with plywood, but the 3/4" sonopan in and 3" Roxul on top, and wrap it with fabric. I build a couple of those 16" x 48" traps and place them on the wall with 2" air gap (more than 2" will look akward in such a small space...). Is that good enough for my case? Will the Sonopan combine with the Roxul do a decent job? Or its waste of money?

Something like this:

Ntchi wrote:

By all the walls, u mean 360? Bass traps even on the front wall? and Sides walls? and ceiling?

That's why I said, "all over the wall behind you too." > What If I build frames ... Is that good enough for my case? < Sure, that will help. --Ethan

Thank you Ethan :wink: Roxul AFB cost only 35$ a bag, while Roxul RXL40 cost 65$...will I get a big sound difference? AFB 3" 0.52 at 125hz RXL40 3" 0.63 at 125hz (according to: http://www.bobgolds.com/AbsorptionCoefficients.htm) Thats the absortion coefficient...Is that worth the 30$ extra? And is the combination with the sonopan will improve the low end absorption?

Ntchi wrote:

Is that worth the 30$ extra?

I have no idea. Tests vary up to 50 percent at 125 Hz for the very same material when measured in different labs. That's the main problem with trying to compare bass trap material using published data like in Bob Golds' list. If you're poor then buy the cheaper stuff. If you're not poor then maybe buy the more expensive type just to be sure. I wish I had a more intelligent answer for you! :oops: --Ethan

lol ok thank a lot! :wink: I'll try this out this Week End

In my opinion you are trying to use a kind of RFZ shape room that is used in a situation where the speakers are placed into the walls and in your case you have the speakers ahead of the front wall Therefore I would suggest 1) Make the front of the room absorptive to reduce the front wall reflection 2) "Bass traps" on all corners of the room 3) Diffusers or a mix of diffusers/absorbers in the rear wall, depending on the dimension of the room (which I cannot find) 4) Side walls I would use typical acoustical panels placed away from the wall 5) ceiling I would also place acoustical panels placed away from it (and these quit thick) What do you mean by sounding odd at lower mids ? Have you made any measurements in the room ?