I would say the SVS sub was a bit more 'high-end' mostly due to its crazy build-quality. The thing is like a boulder. If you haven't come into contact with one, you should. The Rythmik subs also have good build quality, but they just don't match the higher end of what SVS does. This has both an advantage and disadvantage because those SVS subs are painful to have to move around. I agree that distortion doesn't matter so long as it is inaudible, but it is a performance metric, and in this respect the PB13-Ultra was and still is a superb performer that is not matched by the FV15HP. You said that nothing could outperform the FV15HP, but that is a blanket statement since there is more to performance than raw SPL.\n\nWhen buying a sub, people are concerned with quality of bass and SPL. You use SPL and distortion specs all the time to support your arguement. Ive never seen the arguement of weight as a performance factor until now. The FV15HP out performed the PB13-Ultra in bass with inaudible distortion and with a resepctable solid build. Tell me, how does weight sound anyway?