| I've built about 8 traps for my studio. The traps are 4 inches thick composed of 703 w/ FRK siding (2 x 2'' pieces sandwiched together). The FRK siding (looks like foil on one side) is supposed to have better absorption properties, but I haven't actually done any comparison tests between the normal 703 and FRK faced 703.
I covered the two pieces in maroon burlap then "framed" them with stained wood planks. They look pretty sharp and cost me about $35 each.
Placing the traps in the corners of my uninspiring rectangular (cringe) control room made a noticeable difference. Remember, all corners count: wall meets wall, wall meets ceiling, wall meets floor.
I did some A/B sine sweep tests in the room both before absorption and after absorption. My sine sweep was played at about 85 db and captured by a fairly neutral omni mic, and only swept frequencies from 20hz - 500hz (seemed to be the biggest problem in my room). The traps did a great job of evening out the frequencies from around 150hz to 500hz, but did little to nothing below 150hz. I really just wish I had a bigger control room!
Hope this helps! |