The MXR Bass D.I.+ is a bass player"s secret weapon. This compact unit is a preamp, DI box, and distortion pedal. Two channels, Clean and Distortion, give you tons of tonal flexibility and distortion flavors. From classic rock overdrives to all-out metal distortion you"ll be ready for any rock gig. The Clean channel gives you the full low-end sounds you expect and need from a bass preamp. slew of outputs ensures connectivity for any application. The XLR output is perfect for running to live boards and for studio sessions. The Bass D.I.+ can be powered by a 9v battery, an optional adapter, or phantom power right from a mixer. If you need a compact preamp/DI, the MXR Bass D.I.+ is the all-in-one unit for you.