And this is one of the reasons I dislike square cones. Their manufacturers claim huge advantages of having more cone area, but the reality is you still have to build a larger enclosure, just like if you ran a larger round coned speaker. So instead of running an 8" square cone sub that has the displacement of a 10 and requires an enclosure equivalent to a 10 (speaking generally here), Id rather just buy a 10" round cone sub and avoid all the problems associated with a square cone design (added mass in the form of strengthening ridges to keep that square cone from distorting its shape under severe excursion, 'corners' on surrounds that require special attention in the form of an accordion shape, non-linear stress through the cone due to non-uniform distances from the coil/t-joint, etc).