It's not always feasible to have an amplifier for your acoustic-electric guitar, keyboards and synths, and sometimes the boomy sound of a mic'd up amp on stage or in the studio needs to be blended with the direct sound for clarity and definition. Perhaps you're looking for a way to properly interface your laptop to professional gear -- and that's where a DI box comes in. Shop Reverb's selection of active and passive direct boxes, new and used, and get the natural sound of your instrument heard by the masses.