Hey everyone. I'm about to put up the acoustical treatments in my studio and wanted to get your opinions on my design. The room is in a garage. The walls are made from cinder block. The floor is dense concrete. The ceiling is plaster with a wood frame behind it. The ceiling is 7'6" tall at the front and 7'10" in the back. The floor slopes from front to rear (by the garage door). Floor is carpeted with cheapass industrial carpet with thin dense padding. The garage door has weatherstripping all around it and so does the normal door. I hung heavy blankets over the garage door. Lemme tell you what the absorbers and traps are made out of: Bass trap- 7' tall x 4'wide x3" deep boxes framed with 1x2's. Outer face is 1/4" plywood. Inner side is 1/8" particle board. Box is sealed with caulk. Box is partially filled with spray foam (Dupont "Triple Expanding Great Stuff") to damp the resonations. I mounted the boxes on wood 1x2's which I attached to the wall with a nailgun. Ceiling Mounted absorbers- 8' tall x 4' wide x 4" deep boxes framed with 1x2's. Side facing the ceiling has 1/8" particle board attached to it to increase raise STC rating. I glued 8" thick fibreglass insulation to the inner side and covered it with polyester batting and burlap. The absorbers are mounted to the ceiling directly with screws. Wall mounted absorbers- various sizes. Framed with 1"x2"s with 1/4" plywood backing to increase STC rating. Facing side is 8" insulation again, with the polyester batting and burlap. Gobos- Just like wall absorbers but 2 4'x6'5" boxes and connected with hinges. I bought Markertek 3" thick "Markerfoam". It comes in 54"x54" sheets! 2 in one box for $30! So... Am I missing anything? Any major ^#$% ups? I'm about 50% done right now. By the way, I ran my room through a room mode calculator and there was major build up in all the modes from 20-300hz. That's why there's so many bass traps and broad range absorbers. Here is a direct link to a page which has the image embedded. CLICK ON ME Also, sorry if the image looks kind of low budget. It is. I made it with Windows Paint. Thanks everyone!