I doubt anyone has ever used it. Other than the obvious, mainly because a cylindrical design is physically already the one of the stongest possible enclosures with the weakness being the attached endcaps. It really only takes 1/4"-3/8" of even reasonably stiff material to make a good subwoofer enclosure, hence the use of sonotubes.
A PVC box would make a neat enclosure though.
BTW, you may want to post these types of questions in the DIY section...
A PVC box would make a neat enclosure though.
BTW, you may want to post these types of questions in the DIY section...