I want to build a 2 pickup bass wired "stereo." This has nothing to do with right and left channels; the essence of this idea is simply to EQ each pickup independently before mixing. I guess I could use this Rick-O-Sound schematic: http://www.rickenbacker.com/pdfs/19507.pdf That is the standard scheme, to have a separate output for each pickup leaving the bass. Or I could EQ each pickup's signal and mix them before the signal leaves the bass. That would call for a survey of available onboard EQ/preamp circuitry, and would require a new circuit design. Appreciate your ideas.