Hi guys, I recently built 8 sound absorbtion panels following the recipe on Thomas and Ron's Klone Audio site (a site which I highly recommend), and just threw them around the room to discover the effects on my system. The panels are 48" x 24" and I randomly leaned them against the walls as a starting point. The results are already quite dramatic, with a more even bass response throughout the room (not as many or as drastic modes), with a deeper, punchier sound. My center channel speaker never sounded so good, as dialog sounds even more natural than before. I have a few questions and concerns: 1. Since my room is only 7 feet high, I can not use 2 of the panels one above the other. Should I construct some 3 foot high panels for this purpose? 2. How do I determine the optimum placement of panels? If I understand correctly, they should not be mounted against the walls, but rather should be elevated 4" off the surface, right? Experimenting with different placement isn't the most desirable approach since I would have to make a lot of holes in my walls in order to mount the panels properly. 3. Since I have quite a bit of extra materials, should I construct some round bass traps or construct more panels? BTW, my room is about 2700 ft^3, "L" shaped, with a fairly plush carpet. The ceiling is a suspended type, with all of the tiles covered in black velvet, mostly for controlling light reflections from my FPTV. The walls are painted sheetrock, with cement almost directly behind them, as my theater is built in my basement. Any ideas?