Boss CEB-3 Bass Chorus PedalThe CEB 3 Bass Chorus Pedal from BOSS offers a split frequency chorus effect capable of applying warm, rich chorusing to the higher frequencies without muddying up the lows. A Low Filter knob helps you further shape your tone. It's an ideal chorus pedal for bassists. Compact chorus pedal especially designed for bass guitar Applies chorus sound to the high frequencies without altering low frequencies Effect Level, Low Filter, Rate and Depth knobs