The Bassbone OD is a bass preamp with two instrument input channels, each of which is fully equipped with a level control, super powerful passive-interactive EQ and a low frequency filter to help eliminate resonance. Channel-A is equipped with a PZB booster switch that increases the sensitivity and load to 10 meg ohms to optimize it for use with piezo transducers as commonly used on upright bass. Channel-B takes a different slant with Drag Control load correction to optimize the tone and feel when using a passive instrument such as a vintage Fender bass. Toggling between channels is done using a footswitch and both channels may be mixed together by depressing the blend switch, should a dual pickup system be in use. Outputs include a A1/4' instrument level output to feed the artist's on-stage amplifier plus a balanced low-Z Radial DI box output to feed the PA system. The XLR output can be assigned pre or post effects to suit the engineer's preference. A separately buffered tuner output works with the mute footswitch for quiet on-stage tuning. For bassists that employ effects, both input channels can share the same pedals by connecting via the built-in send & receive effects loop. This is augmented with an on-board bass overdrive with control over the drive level and tone. A wet-dry mix lets you add slight grit similar to an Ampeg SVT or full on distortion depending on your mood. The OD footswitch may be assigned to the loop, overdrive or both. Finally, a built-in headphone amp with 3.5mm output lets you use the Bassbone on the bus for those long drives between gigs. Comes equipped with 15VDC power supply. The Bassbone OD . the world's most powerful bass preamp in a pedal.Set Contains:1 x Bassbone OD1 x 15V DC PSU1 x User ManualToggle between any two basses with easeBass overdrive with wet-dry control for extra gritDrag control load correction for vintage bassesPzb booster and 10 meg piezo input for upright