Hey
There are some great threads to guide people through building their own panels for sounds absorption. Here are some pics of the ones I built from the help of this section. They have made a huge improvement in my room, I may actually add more over time. The room before the panels, had some real reverb issues. The room is 20 x 40 x 12 and has stained concrete floors so there were hard surfaces everywhere. These panels have managed to absorb nearly all of the reflection issues. I still have some room for improvements.
I used Roxul as my insulation. I framed out each panel using 2x3 boards and backed them with pegboard paneling. The dimensions I used for each small square was 25" x 25"(made 6 of these) and the large was 49" x 49" (made 2 of these) and 25" x 49" (made 1 of these). I used a total of 8 sheets of Roxul that was 2' x 4' x 4". All the fabric to cover these were of course WAF approved and they came out great.
Here are the pics.
Jeff