MXR Jd-M80 Bass Di PedalMXR M81 Bass Preamp Pedal The MXR Bass Preamp combines a pristine bass preamp with a studio quality Direct Out in a Phase 90 sized box, providing clear tone without hogging precious pedalboard space. Use it to add a new voice to an old passive bass, sweeten up any amp, or put some special sauce on a particular song. Dial it in just the way you want it and send it straight to the housepre or post EQwith the built in Direct Out. The Bass Preamp features