Ok I believe that one is the eD A7-900, a real huge subwoofer. Well you can't knock the capabiliy of a ported sub with 2x18" drivers driven by a 1300W amp in a 19.5 cf enclosure. That amp is a beast and almost 4 times the size of the EP600.
Maybe its just me but above a certain weight and size these super subs get to be impractical. However there is no denying that acoustical physics favours very large sub enclosures and big drivers . At 435lbs though it would require 4 guys to move.
I don't even want to think about finding the sweet spot. I can't comment on how it would sound except that its output figures suggest huge and presumably clean output down low.
