I had a PB12 a long time ago. It was a good midrange sub, and good for music. But it’s a 25hz sub so mediocre for movies, and I suspect the pb10’s are probably f3 around 30hz. Weak... My guess is theHSU will easily outperform them.
FWIW, HSU has THE WORST subwoofer ID system in all of cataloging ever.