Just bought a used PLX1602 and need suggestions with setting it up. Preamp: Sansamp Tech21 RB1 Speakers: Avatar B210 (4ohm) and B115H(4ohm) If I want to run both speakers at the same time (from a mono signal from the Tech21), how should I set the dip switches on the 1602? It appears that "Parallel Input" is the way to go, but I'd like to hear from players who are already using a 1602 with two cabs. And what about the clip limiters and input filters? How should those be set for running bass cabs? Thanks!