hello everyone. i'm getting ready to build some panel traps out of
owens corning 703 and 705. i want them to be portable because i'm not
sure how long i'll be recording in my present (less than perfect)
space. my plan is to build 2 x 4 ft. frames for each piece and cover
the fiberglass with burlap. i'm not sure how best to build the
frames, however. should i build a simple open front box with a piece
of 2 x 4 ft. plywood as a backing or should i make a frame with a few
pieces of plywood spanning the back for structural integrity? also, i
plan to use the 705 to build corner traps for my control room. i'd
imagine that these should not have any sort of plywood backing as it
would reflect some sound back into the room and render the airspace
less efficient. correct me if i'm wrong. i'd like to do this right
the first time, so if anyone has any leads on the best way to make
these absorbers, i'd appreciate it. i'm also still shopping for a
source of burlap. if anyone knows of a good place send it my way.

thanks.