2x12 with V30s, front ported, angled to beam tonal fireworks straight into your unsuspecting, soon-to-be-rattling skull and violating your poor, unsuspecting, formerly-unperforated earholes.
With Avatar build quality and Line-X finishes, they look funky, but I bet they work great. They probably even get rid of some of the whole "blasting your knees and the front row of the crowd" problem.
Definitely cool, but I think before I'd spend money on a few of these, I'd probably get some in-ear monitors.
Though, I think one would make a cool cab for a small lunch-box head