Two items at my place. My Diamond Bass Compressor has a defeatable tilt EQ that's very useful, especially with two tilt points. As well, I have the old Raven Labs PBR-1 on-board preamp for P-bass in two basses: a P-bass (duh) and a Peavey Fury. The tone control is notched and provides a superb tilting EQ that leaves the essential tone of the bass intact. Another great little Steve Rabe gadget. In terms of tone-shaping, I personally find this approach really practical, especially in the hands of Steve Rabe or Mike Knabbe.