Behringer V-Tone Bass BDI21 - analog modeling bass pre-amp/stompbox with DI recording output, authentic V-Tone modeling technology capable of dialing up big vintage tube tones, funky slap sounds, crunchy distortions and anything in-between, provides a truckload of great amps in a single stomp box from traditional bass amps to modern overdriven amp tones that would typically require a multitude of effects units, authentic tube emulation circuitry can be mixed with the direct bass signal via blend control, dual DI mode for either direct recording output with tube emulation or standard active direct injection box in bypass mode, output available on 1/4' TS or balanced, gold-plated XLR connectors, ground lift switch. Powered via 1x 9V battery or optional DC power supply.