sentences:  Since it is only wired into the neck pickup side and not in the circuit of the bridge pickup, it only affects the volume of the neck pickup in both the neck and middle switch positions and has no effect in the bridge position.Turning the knob up (clockwise) increases the resistance — more resistance is more volume reduction prior to the signal reaching the volume knob.The potentiometer value on older models was 500k offering variable resistance from 0 - 500kΩ.