I am building a theater room in my basement.
I have an odd space about 12"x16" that can't really be part of any room in the front left corner of the theater room-to-be.The space seems perfect for a bass trap! Maybe?
Here's my room:
Notice in the bottom left is the "space" between the stairs and the bathroom on the left (which you can't see) - it is to be slightly behind the screen and extends to the corner. The gray is my concrete foundation.
Here's that corner a little closer up:
Notice that the screen covers part of it. (I might go AT with a 14" deep AT space, so screen could be further forward. For now, it's on the wall)
Here's even closer. The orange blocks are the studs. White flat rectangles are drywall locations. Black circle a 4" drain pipe. All drywall is already present except the drywall in the theater itself.
Squiggles show wall spaces (which have insulation batts in them)Current plan:
Leave a 4.5" gap with no drywall between the corner stud and next stud. This "slit" runs floor to ceiling. Cover corner (actually whole screen wall) with GOM fabric panels. Or just use velvet or something. I would fill the space with loose pink fluffy. I want to trap 30 Hz up to 300 Hz or so in here or more. But I want to trap as low a frequencies as I can up to 300-400 Hz.Question #1:
Can this space be used as a bass trap? Or should I just drywall over it and forget the whole idea?Q2:
Do I need more of it to be open to the room? I was planning just to leave a 4.5" gap in the corner open (not put drywall there) but cover the rest. If general consensus is that I need more opening to the room, I can cut some holes in strategic places in the rest of the drywall on the other side of that 2nd stud to open up more area.Q3:
What should I fill the space with? OC703? OC705? Loose pink fluffy? Packed pink fluffy? Something else"Q4:
Do I need to cover it with GOM or some other AT material, or will any material work if I'm doing just 300 Hz or so and below?
Thanks SO MUCH! I am drywalling in about a month and want to fill up this space with the right stuff and do the drywall in this corner best to support bass trapping. Other in-room bass traps can come later but I need to figure this one out now.
A couple other questions for the group I had during my research today.
--Why do most DIY base traps on this forum use OC703 and not OC705? Isn't OC705 denser and a better bass absorber? Or am I missing something?
--Isn't tightly packed pink fluffy better bass absorber than loose pink fluffy? More lbs per cu. ft. (pcf), right? Or wrong?
Again, thanks everyone. I want to get my OC70x ordered soon if I need some!