DiMarzio BW2100 P Bass Wiring HarnessThe heart of DiMarzio's drop in prewired P Bass harness is the combined use of our custom 500K volume and 250K tone pots. Introduced over 45 years ago, Dimarzio used a 10 step rotary switch to create a taper that works with their high impedance pickups. It's neither a linear nor audio taper pot it's DiMarzio's custom taper. To further increase reliability, the center shaft and threaded parts were made from solid machined brass instead of cheap