I've really looked all over and can't find a diagram, so here's what I'm doing.
Ripped the active pre out of my Epi T-Bird Pro. Too scooped, don't like it, blah blah, anyway...
I have 4 holes to fill and want to do this:
top/front = neck vol
top/back = bridge vol
bottom/front = master tone
bottom/back = 3-way selector
Is this possible? I think I've kind of pieced together how to do this by looking at the Seymour Duncan site and combining the Passive Soap diagram w/ general Gibson 2x2/3-way sort of thing. Am I wrong? Might be... Also wondering what the general consensus is about 500k vs 250k pots. Pickups are the Duncan Designs that came w/ the bass.
There are two ways you can do this. As shown above, with the wiper terminals wired as outputs, to allow a constant input impedance on the pickups, but no independent control; or with the wiper terminals wired as inputs for independent volumes that cause a variable-impedance loading effect on the pickups.