[Sonnie]

Actually Darren and I were discussing the SS RL-p15 earlier. He stated ThomasW had recommended the dual 4ohm version due to its higher Qts of 0.447... which is indeed higher than everything else I've been looking at. Of course I have no idea how that figure comes into play. I don't understand all the TS parameters and their various explanations/uses, etc.

As far as xmax... I'm going by what I've been reading about some of the lower xmax drivers being pushed to their limits fairly easily. I may not need the full amount offered by these drivers but I've not seen anything around the minimum of probably 18-20mm that I would at least like to have. I'm still looking though. $2000 for 8 drivers is pretty stout.