CEB-3 BASS CHORUSBass Chorus Specifically designed for bass applications. Low filter knob to avoid muddiness. Stereo or mono outputs. From subtle detuning to rich, spacious chorus. AC adaptor or 9V battery operation. Five year warranty. This great chorus pedal is designed specifically to accommodate the range and applications for the electric bass. To avoid muddiness, the effected frequency range can be accurately controlled using the low filter knob