I agree completely with almost everything you said. There are some monster subs out there and most of them have extremely low effeciency, huge power handling and sound like crap for anything but SPL competitions. DD and Kove stuff is monstrous, but I'd never expect SQ out of them. If you model them in an audio program, the freq. plot if horrid.
Like i said, for the price the MASS subs are difficult to beat with brand names car audio. But, you could spend the same money and get two to three 12-15" subs with 16MM of xmax and equal if not better SQ and better sensitivity.
