Depends on your definition of "hot", but the EMGs in my P bass get along fine with the VT, I just have to adjust the input gain when going back and forth from my passive bass. Maybe I should make it easier and play the P at half volume to match my J- actives don't loose high end when you turn 'em down. Hmmm....
The VT-bass plays fine with hot active basses. Both my Schecters have custom wound very hot Kent Armstrong pickups and OBP-3 preamps. One is a dual humbucker and hte other is a J/MM config. Those two basses are close enough to volume that switching doesn't bother me or the VT.
However, in the past I've used Radial Hotshot boxes or other A/B pedals with volume controls for the different inputs to help tame volume differences between basses. [Invalid or Expired Link Removed]

