A CHORUS PEDAL WITH BUILT-IN CROSSOVER The CEB-3 Bass Chorus pedal offers a split-frequency chorus effect capable of applying warm, rich chorusing to the higher frequencies without muddying up the lows. It's the perfect chorus pedal for bassists. Boss CEB-3 Bass Chorus Guitar Effect Pedal Features : 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 permit precise tonal shaping