Perfect for active pickups or line level keyboards and synthesizers. The Ernie Ball 25K Stereo Volume Pedal features a super smooth foot sweep for precise volume control and is perfectly voiced for active audio signals. The 25k pedal is extremely versatile and can be used in stereo or mono applications. Utilizing TRS stereo cables, use the B input and B output. Tough, long lasting Kevlar cable transmits pedal travel to the 250k potentiometer and is attached by a stainless steel spring.