Bill, Could you say a few words on why the tweeter is not reversed on this design but is reversed on the TD15M & SEOS-15 design? The crossovers look very similar. I'm very sensitive to tweeter polarity as my surrounds have the tweeter polarity reversed and sounded horrible with my Fusion-12 Tempests. I ended up reversing the tweeters on the surrounds (EV ELX112's) to avoid the out of phase sound, at the expense of some loss in fidelity around the crossover region on the ELX112's. I have a pair of SEOS-15/DNA360 pulled from a pair of Cinema 88's's that didn't work out and am thinking about using them for a TD15M & SEOS-15 build to replace the L-R Tempests. But I'd need to replace the center channel Tempest crossover to match the new L-R's, hence the tweeter polarity question.