[quote="TwoPort":2deprsqi]Finally - to answer your question (sorry)... The low B is very stout with the PJB and it is very tight. You will easily hear the note and it will do a good job of getting into the room. But you will not feel that low end phat fundamental like you guessed.[/quote:2deprsqi]
Responding late here, but thanks, TwoPort, for articulating this so well. I'll add my "+1" as a Six-Pak+Dingwall guy.
The first gig I played with this combination was a farewell for my band of 9 years. The various guitarists took turns until we had 7--yep, 7--playing at once at the end. There were Marshalls, Twins, a Vox, a Boogie, and something else... much more volume than I had with my measly little R2-D2. But it cut through it all and carried things just fine.
TwoPort is also right, though, that you don't feel the fundamental moving your behind quite like you might like to... maybe not a good dub amp (BurningSkies?).