just more info from other sites i am posting at. I have a couple other subs than the TC's, So i was planning on running the two TC's up front and crossing over at 60 or 80 hz, then either the tumult or CSS SDX15 in the rear crossed over 40 hz up to 100 or 120 hz. Does this sound like a more round and even setup? and if so, which driver the tumult MKII or the SDX15 or another one, would do the best job in that freq range? ThanksModerated By: brian@diysubwoofers.org