The Sadowsky Outboard Bass Preamp/DI Pedal contains the same famous circuitry built into every Sadowsky bass. Housed in a small footpedal box for use on the floor, it measures just 4.5″ x 4.5″ x 2.25″ and weighs 1.5 pounds. Just plug your bass into the box and then go from the box to your amp, and/or direct to the board. Controls consist of volume, treble boost and bass boost. Footswitches for preamp bypass and a mute switch with a live tuner out. Other features include ground lift switch for the DI and a low battery indicator LED. The Preamp/DI Pedal is perfect for vintage basses where installation of an onboard preamp would affect the instrument’s original condition and resale value. The Preamp/DI pedal is recommended for all passive basses, basses with active pickups, and instruments that have active electronics that can be bypassed. It also works great with all upright bass pickups. We offer an AC adaptor for 120V and 220V. This is the only AC adaptor we recommend to work reasonably quiet with our Preamp/DI Pedal. For noise sensitive situations, like studio recording, battery operation will be the quietest.