Vintage Old School
Gold Member
Do all your panels have a 4” depth? Did you consider 6” depth?
All my panels have a wooden frame depth of 3.5 inches (1 X 4s). That leaves room for 1.5 inch (1 X 2) cross pieces mounted above the 703 to keep the sides from bowing in when under pressure from pulling the fabric tight on all sides. I only used a single sheet of 2" thick insulation in each panel as I was only trying to tame some of the cymbal frequencies. I'm not an acoustic expert but from what I've been told 4" depth of 703 would start to affect mids and possibly upper bass. 6 inches (or more) of 703 would be really aggressive sound absorption better suited for bass traps. I have an 8-foot tall ceiling in a 160 square foot room so the cloud over my kit hangs 4 inches from the ceiling to the top of the panel. That leaves me plenty of room for my overhead mics not being too low over the kit and the single sheet of 703 should remove any wonky frequencies from the cymbals that would otherwise be bouncing back into the mics from the ceiling.