Thinking of installing an infinite baffle sub in my living room (home theater room), which is 11x25x9 (I know, not ideal). Would be used almost entirely for HT (I have 3 other subs available for music duty, including an SVS). I am looking at perhaps dual tempests or maybe other drivers in the same price/performance range in a transition box (semi-isobaric chamber) mounted in the basement, opening into the floor of the living room. I can drive the sub with a variety of amps that I have available, including a Crown CE1000 or a QSC RMX2450. Heck, I might even be inclined to add another amp to my rack if I feel the need. EQ would be via a BFD. Ideally I would like the Q to be in the .5 - .7 range. Am I correct in assuming that the system Qtc would be exactly equal to the Qts of the driver? Drivers that may be up for the task? I am considering the Tempest, based on the common usage in such applications (based on the Cult of the Infinitely Baffled forum: http://f20.parsimony.net/forum36475/index.htm But I am also considering an array of less expensive drivers such as the Madisound 15254 DVC or the 15258 DVC. I could effectively double the number of drivers to 4 for the same price. Thoughts? Other driver options? Experiences with infinite baffle systems?