I gig with both a Model II/B2 or a Compact, depending on the gig, and the need for mic'ing the kick.
It's becoming apparent that positioning of the B2 is very important, maybe more so than B1s.
I've found this before, but now realize that it is most always better to place the B2 away from the back wall.
We'd always been told you get more bass when a B1 is against-the-wall, but with the B2's added range/output, it seems that it works better in the position I am showing in the picture below.
This might be the case with a short stack of B1s as well, as I've found, during the pre-B2 days, that it also works.
At the venue pictured, the kick sounded "hard" to me, moving the B2 onto the drum rug cured it, the sound was warmer, fuller.
Just something to think about.