As for the bass; on further inspection the 15PA is only +2 or 3dB from 30 to 40, which is not exactly huge. They can both be tuned to play solid to 30-something in most domestic sized rooms, & that is pretty cool. It seems we both like the other driver for the same reason, box size. I like the sound of a big cabinet. I do not know why, but box size seems to be a big deal in my room. That and a bit more in the mid thirties will put me over the edge when I take my musical taste into account.