I swaped these out for an aguilar. These are 18v preamp with blend, mid, bass/treble (stacked) pots pre-wired. if anyone wants them email me. @ firstname.lastname@example.org (include "fender pre" in subject column please.) knobs are not included. and you can download wiring diagram from fender's gearhead website. I am thinking $50 shipped/obo preferably through paypal.