I wanted to thank everyone here who responded to this thread. I took your advise and the results were way better than expected. Though they are not all assembled and in use, I have purshased the materials to make a total of 18 absorbers for the two rooms. 6 with 4" mineral wool and 12 with 2" OC 703. I had a session yesterday and hope to finish tracking today. I used 7 absorbers in the 13 X 13 while tracking drums and the results were just AWESOME. I have 5 panels hanging in the 13 X 20...one on each side of me and directly be hind me between the closets, and 2 in the corners behind me. I will either finish building the others for the mix room or I will just move some from the drum room into here for the other corners while I mix. I also plan to put a couple overhead. Ill get some pix posted in the studio display forum soon I hope...
Thanks again to everyone.....