They also give you a bit deeper extension. Both can comfortably dig under 20Hz. The elbow of the response for the PB-1000 Pro and LV12F occurs above 20Hz. What is more, in the case of the Outlaw Audio sub, it has a nice finish and a plexiglass top. Of course, with shipping, it is more expensive than the others, but it's a nicer-looking sub for sure.