Thanks Schubert, at least your comment gives validation to your negative feedback.
To everyone else, I'd really like your experience and thoughts.
I have three 2' x 4' x 4" absorption panels on each sidewall. I also have two 2' x 4' x 6" absorption panels behind me, with two 2' x 4' x 4" absorption panels behind the 6" panels, effectively giving me 10" thick panels behind me.
I know that's a lot of absorption, but the sound is crystal clear. Now if I can tame whatever's causing the ringing when I sitting in the room.
Thanks,
Chuck