Originally Posted by jhbrandt
Here is my 'take' on polys.
Based on information gleaned here and from other sources, this is a poly diffusor / bass trap I am proposing to build. The criteria is that the panel be as cost and build-time effective as possible, have the ability to be free hung as a temporary installation 2+ inches from the wall (most likely by chain), and be portable enough so that I can take them with me when I move from the room that I am now renting. The intention is to create a relatively live ambience for drum tracking, while at the same time achieving as much low end absorption as possible.
The approximate overall dimension of the panel is 7' x 4' x 10". Trapping would consist of 6' x 2' x 4" of unfaced OC 703, stuffed inside the framing without touching the front face. Rather than using wood for the face, I am going to try using a material called Coroplast (4mm), which is a durable, lightweight, flexible corrugated polypropylene copolymer (imagine corrugated cardboard, but made out of plastic). The reason for this is that it's relatively cheap, very lightweight, is much easier to form/bend than wood, and doesn't have the fundamental resonate note that wood has when taut (think of the thud of a muffled kick drum). Coroplast
The room is fairly large (700+ sq. ft.) and instruments can be placed 8+ ft. from walls without much problem, so hopefully the artifacts usually caused when too things are placed too close to polys won't be an issue. The plan is to build 6 of these to be used in conjunction with superchunk corners, a few ceiling clouds, as well as a handful of tube traps that I have.
Any suggestions or thoughts on the specific approach (as opposed to the much larger pro/con poly discussion) would be welcome.