[MOSFET]

Except cookies don't have to worry about distortion-free excursion. Yes,
IN
THEORY a square sub is a more efficient design, but to be accurate, the
whole
thing has to move in and out evenly, and that's a lot trickier with a
square
design. Not saying it can't be done, just that it's not as easy as with a
round
design

Good point, Matt. I'm sure a cone shape that matches the shape of the
voice-coil/former (which is pretty much ALWAYS round) is the best design for
optimum linearity.

I was thinking strictly about cone area over a given large baffle space.

MOSFET