Mint in Box. The Suhr Dual Boost is an extremely versatile clean boost housed in a pedalboard friendly enclosure. The Dual Boost pairs high quality components with an on-board charge pump circuit that delivers the best dynamic range and purist audio path, all from a single 9-volt battery powered pedal. Two independent modes, a global Boost Range and Suhr proprietary Multi-Function Technology switching. No matter what you throw at it, the Dual Boost offers clean, tone-preserving boost without changing the color of your original tone.