Glenn,
Congratulations on the new Alpha Series line, you have a winner with plenty of potential left to explore.
I have some significant low-bass rear-wall-interaction problems, but also could use more absorption at 65Hz and up. Brian recommended T40 tuned traps for the former, but I've been unable to proceed as my wife drew the line on aesthetic grounds (it's our living room, and I do see her point). The Alpha series might provide grounds to reopen the discussion, and I would like to add some diffusion to the pure-absorption GIK products I have so far. How low can the 6A Alpha products absorb? How do they compare with Monster Bass Traps with limiters?
Thanks.