Well... It is very similar to the Hsu VTF-STF-3 ... and is an excellent value. It was not compared to a PB1+, It WAS compared against a PB2-ISD... which found what you would expect... both were darn good... with the PB2 going deeper and louder... having two drivers of roughly the same capacity and twice the internal volume will do that.

Another way of looking at it, Take the Outlaw, make it into twin drivers in twice the cabinet volume and amp... and you will have an Outlaw LFM-2... if that makes sense...

Great choice though... for $579, you got a screaming deal.