IMHO, the problem is the $500 PB1000 is tuned to a pretty low frequency for a 10" ported sub and has
no provision for tuning it to your room:
- Freq. Response | 19-270 Hz ±3dB
The problem is if you put this sub against a wall or in a corner, the amount of room gain you will typically get results in exaggerated bass in the bottom octave which is one of the worst things you can do to music!
The true objective is to get flat frequency response down to 20Hz
in your room, which is rarely the same as flat response in an anechoic chamber!
Compare that with the $400 10" Hsu VTF-1 Mk3 which is also capable of being tuned low ... +/-2dB at 22Hz, However, it has the ability to tune the sub to your room via 3 different port settings, 2 EQ settings and a knob for "Q". That pretty much ensures you can tune this sub reasonably well to compensate for room gain.
Audyssey can sometimes help with compensating for room gain, but IME, the amount of room gain exceeded what Audyssey is capable of compensating for. This experience is with a pair of JL Audio e112 which are 12" sealed subs with DSP to result in a flat FR into the low 20's. I suspect, with the addition of miniDSP, I could cut the bass enough to get the e112's sounding good, but I have a tough time paying so much for a sub powerful enough to perform so low/strong as these do (for compact subs),only to pay more (in money and time) to get rid of that low end capability.
In my case, dual ($150/ea) SUB-1200's easily outperformed dual ($2000/ea) e112's. The SUB-1200 does not have any ability to tune, but it seems, either by design or dumb luck Dayton Audio ended up with a FR curve that is pretty good
after room gain
in my room and allows Audyssey to tune the bass with good success! - YMMV!
My conclusion:
Avoid the PB1000 (I think the higher level SVS subs offer better ability to tune, so just know to stay away from their low end products),
If you can afford the Hsu, get it for the tunability.
If you can't, get (ideally dual) SUB1200's and hope it matches your room reasonably well. I feel it is likely to be a better fit than the PB1000, and if you are going to have errors, I'd rather they be insufficient bass than to be locked into too much bass.
And just to contradict myself, the combination of miniDSP/mic/REW would allow the PB1000 to be properly tuned and it is better to be turning down the bass (as you are most likely to with the PB1000) than to be trying to increase the output (as you are more likely to with the SUB1200).
The question of dual SUB1200's vs a single Hsu is a difficult one to answer. Based on my positive experience with the SUB1200 (in my and in my GF's rooms),I would go for a pair.