Hello all Here is a mid 80's set of active Seymour Duncan PJ pickups. There are 3 dip switches on the pickups. If memory serves me the switches are bass boost, treble boost and resonant frequency peak shift. The res freq shift makes them go "EMG" sounding (really active like). There is no preamp. it is wired vol - vol - tone. There are 3 wires coming from each pickup, white, black, and red. the red goes to the battery. Here is the wiring schematic I used Get the whole kit n kaboodle for $80 shipped to your door. USA Only (HI and AK ok) *your choice of battery harness or battery box.