Ernie Ball's Most Valuable Pedal, their MVP Volume Pedal. This volume pedal works with both passive and active audio signals, and has the ability to set both the heel and toe positions. You can have the heel anywhere from zero to 50% and the toe position can be set at 100% up to a boosted 20+ db to really boost leads. There's no high frequency loss at any volume, and with an improved sweep this is an ideal volume control.