Originally Posted by shadyJ
I would say its bad. Look at how it's mid bass compares with every other sub on data-bass.com, it is getting bested by even entry level subs. At 60 hz, a pretty crucial frequency, it has the weakest performance of all measured subwoofers. At 50 hz, it is nearly the worst, only outdoing its sealed counterpart and a goofy B&W mini sub. These are the frequencies which matter most. Like I said, it has good 20 hz output, but since the vast majority of bass material lay from 40 and up, that is not much of a consolation. Sure a PB12 NSD would be good for such a small room, but if you are going to spend nearly $800 on a subwoofer, why not get a good one? Also, I think you are underestimating just how easily its limiter can be hit.
I think your opinions are very much shaped by a heavy bias toward HSU and a determination to make the VTF-3 the best sub in its class because you have owned one, even though there are no measurements for it in the data-bass.com table to compare with these other subs. And even though we also know that the VTF-15H underperformed HSUs specs when it was tested by Audioholics--possible the VTF-3 could too. And even though the creator of data-bass.com and all those measurements, Josh Ricci, overwhelming recommends the SVS PB12-NSD in his full review and gives it a 4 1/2 star value (does Audioholics ever five for subs for that?) and recommends it for 3,000 to 5,000 cubic feet of room (which is not small): http://www.audioholics.com/reviews/speakers/subwoofers/pb12-nsd/pb12-nsd-introduction
To me, this is like arguing which is better, the Mustang GT or the Chevy Camaro. In any given year, one may have an edge over the other, and there could easily be a full scale battle over arguing which is the best.. But when it all comes down to it (and I am a Mustang fan), both are equivalent in class, much like the SVS PB12-NSD and the HSU VTF-3 MK4.