I'm looking to get some 703 48x24x2, I hear the 703 has soft edges when you try to cover it with cloth. I was thinking of making a 2'' wood frame to go around the 48x24x2 703, will this hurt the accoustics of it. And should I leave a space behide the panel when I put it on the wall. How far apart should I hang them, from the first reflection point. I hear 1ft to 2ft apart.