Originally Posted by shadyJ
In your circumstances, I would go with the VTF. I must admit to being pretty biased, being a VTF owner, but I think the VTF would have a substantial output advantage against the PB12. Take a look at Audioholic's subwoofer comparison tables, and compare the Outlaw LFM-1 EX with the measurements for the PB12 NSD. You'll see the Outlaw has a pretty large headroom lead over the PB12. The LFM-1 EX is basically the same as the VTF3, the difference is the VTF3 has deeper extension, less chances of chuffing, and more configurability. I think the PB12 would have less distortion at 20 hz, and stronger limiter protection, but I don't think these subs are equal in clean output capability as is often suggested.
Shady raises a valid point; in two metrics (maximum output at most frequencies and group delay), the LFM-1 EX
(let's just consider low extension mode) scores higher than the PB12-NSD
, according to Audioholics' recent reviews.
On the other hand, they both have strong ouptput well below 20Hz, and the PB12-NSD performs at nearly all frequencies with lower distortion (at many frequencies, the PB12 produces half the harmonic distortion, or less than half) and better linearity (click the charts to return to the Measurements and Analysis page of each review). In fact the NSD's frequency response is something of an anomaly--there are more expensive, more powerful subs out there that don't really approach its flatness and most exceed its THD numbers (more THD is worse). As mentioned, the PB12-NSD's DSP limiter keeps it in check: it's very hard to bottom out the driver, or to overwork the amplifier, or to get it to misbehave in general; some people call it "bullet-proof." Plus, they give you a five year warranty on everything, amplifier included. This is not at all typical for internet direct subwoofers.
I'm biased too--I own the cylinder version of the NSD--so, predictably I argue that there's a lot more to a great sub than maximum output
OP: you did ask which sub would provide the stronger response in your space, so the answer has got to be the VTF-3. I just want you to know that there's more to consider.