Originally Posted by shadyJ
Lol, Sound and Visions measurements show the PB1000 to be just behind the PC13 in CEA output. It also beats the PC12 NSD and absolutely owns the SB13, according to S&V. If we are to take S&V's measurements seriously, the PB1000 is bar none the absolute greatest sub value of all time. SVS's and Hsu's own internal measurements are at least consistent within their product lines. And even then, I wouldn't use their data to compare with other data sets, not Josh Ricci's and especially not S&V's.
As for the PB1000's driver, supposedly it is fairly light so I would guess it is more sensitive. However, last I heard the VTF2s were using the same driver as the VTF3s, and that thing is a brute. You are right that I am guessing here, but I think its almost certain that the PB100s driver is much inferior to that of the VTF2.
You sure do seem to make friends on every thread you post!
I will give you that S&V's numbers are not consistent. So throw those out. The lower extension on the manufacturer's graphs of the PB1000 and LV12R look identical, and they are both rated wtih -3dB at 19Hz. SVS has always published graphs and specs that have been shown to be verified by third party testers, including Ricci, many times. So I doubt that the LV12R will play much lower. No doubt the extra $100 and bigger drive will deliver more output. How much more, I am not sure. It is up to the OP to decide if it is worth the extra money. As for the HSU, I can't seem to find many third party reviews or measurements. Do you have a link?
As far as the driver, here is a section of Jim Wilson's LV12R review:The 12" driver isn't particularly impressive to behold, completely absent exotic materials for the cone or basket. Instead what you'll find seems pretty standard; treated paper cone, stamped steel basket and a fairly thin rubber surround (thin, as in material thickness). There are dual slug magnets, a sizable voice coil bump-out and a 1" cooling vent, but those are pretty standard for this class of subwoofer. The driver itself is only held in with wood screws too, so you certainly would be forgiven if you thought this setup was nothing special. But upon closer examination you see there are two sets of leads connecting the driver to the amp, one of which is marked "Servo". That's when you begin to realize looks are deceiving, and that perhaps something else is afoot.
He goes on to discuss the servo stuff in depth, but he does not seem to impressed with the driver itself, FWIW.
Here is his section on the SVS drivers:The drivers are a long throw design utilizing what appears to be a polypropylene cone, along with a huge half-roll rubber surround. They're only held in place by wood screws though. There are dual ferrite magnets, a vented pole piece with a bump-out and an FEA (Finite Element Analysis) optimized motor. The frame is stamped steel, with the overall feel and appearance being of a light duty design. Based upon some of the photos I found of the previous generation PB10-ISD/NSD drivers this one doesn't appear to be as robust. One curiosity I noted was there are two sets of wires going to both the positive and negative terminals from the amp. I'm not sure what the purpose of that was.
To me it seems like the only difference is the surround being thicker on the SVS. From these reviews by the same guy I think they are of similar quality. Again, other than an old 2007 review linked on the Hsu site, I can't find much info on the VTF2 driver to declare it is far superior to the PB1000.