My dream subs are already procured. 2x 15" Audiopulse AXIS drivers in 5 foot sealed system each, powered by 2000 WRMS each, for each channel of my new 4 way speaker system that should be completed next year(can not finish it this year due to other obligations I am meeting).
These drivers will easily produce monstrous output down to 12 Hz or so in the sealed system. They could easily damage normal house construction.
-Chris