I know that it's been discussed that breathable fabric is recommended for bass traps and fixed acoustical panels. I'm looking to build some Gobo's for my live room to place around guitar cabinets to lower bleed into drums in a live recording situation.
My question is what material should be used to cover the OC703 being that they will be moved around the room. Is there a risk of fibers being released into the air every time these gobo's are moved? Is it still safe to use a breathable material like burlap?
FRK and FSK facings are for corner bass traps. Panels at reflection points, and on the rear wall of a small room, should not have the facing. It's that simple.
Hey, Ethan and Glenn:
I assume FSK for corner bass traps is to reflect mids and highs off your traps. I am wondering if you can economize on the number of thin panels you need for mids and highs if you allow the bass traps to absorb some mids and highs (i.e., no FSK), or is that a no-no?
The number of panels depends on the room. Every room will be different. I would recommend covering the important points like early reflection points (What Are Early Reflection Points. SPOTLIGHT:Bob Ebeling - Revolution Studio) and back wall (actually you want thick panels for the back wall) and see how the room sounds. At that point you can place panels on the back side walls (or diffusion) and ceiling to help over all decay and flutter echo.
1) When using FSK, does it only have to be on the most outer panel? Or should you layer say a 6" deep panel with 3 2" FSK faced panels? (Sorry if this is a silly question)
You only want th FSK on the face of the panel. NOT in the middle or back.
Is it better to place your bass trap corner panels closer to the ceiling or is center prefered? I always assumed leaving the corner where the walls meet the ceiling open was a no no.
Bass is going to pick up in all of the corner. Tri corners do pick up a bit more bass but it is not critical to put the trap there, as sometimes in the front of the room having it in the middle will help with SBIR (What is SBIR?). Honestly though covering from floor to ceiling is always best.