What to do with a 7 x 9 x 8 room in a basement?

[Glenn Kuras]

The problem with this room is going to be near by walls causing a lot of comb filtering and low end build up. I would recommend thick fiberglass panels no less then 4" (I prefer even thicker). Thin foam is not going to fix the problem.

[Icecube1]

Originally Posted by 4ever21

In before: move out of your room, don't mix there, buy >24 bass traps, etc.

Damn 4ever21 you beat us to it

Seriously though, you just can't overdo the bass treatment on this type of room. Do not even think about 2" porous treatment. 4" treatment straddled across all corners wall/wall and wall/ceiling as minimum. I recommend you sit dead centre in the room, set up your equilateral with your monitors and adjust the monitor position for best response (ideally using measurement software but by ear if necessary) Use broadband absorption at the first reflection point on side walls and ceiling. If still not getting a usable response check the axial modes and maybe use pressure traps (MLV or panel) on the wall space still available.

[4ever21]

Thanks guys, I appreciate the responses. I took a look at what's available at home depot today, and it looks like I'll possibly be making 2' x 4 ' x 6" traps out of Roxul- if I can't find a decent vendor for the 703 stuff. I guess I'm forgetting about the auralex too.

[Icecube1]

Originally Posted by 4ever21

Thanks guys, I appreciate the responses. I took a look at what's available at home depot today, and it looks like I'll possibly be making 2' x 4 ' x 6" traps out of Roxul- if I can't find a decent vendor for the 703 stuff. I guess I'm forgetting about the auralex too.

+1

Remember, the thicker you go above 6", the less density porous material starts to work better at low frequencies. You can make comparisons with this:-

Porous Absorber Calculator

Rgds

[4ever21]

Is there a downside to using both OC703 and Roxul? I'm probably going to spend the money and make four 6" traps out of 703, but if I can cut costs somewhere I would.

Also, if making 4 a good idea? I thought I read somewhere that the amount of surface area you can cover is one of the more important features of good bass trapping. So if I went down to 3" of 703 and made 8 traps...I'm on the edge of thinking that might be a better idea.

[Glenn Kuras]

Also, if making 4 a good idea? I thought I read somewhere that the amount of surface area you can cover is one of the more important features of good bass trapping. So if I went down to 3" of 703 and made 8 traps...I'm on the edge of thinking that might be a better idea.

Yes covering more area is key but I would go with 4".