The DB500 from On-Stage is a single channel, passive direct box that transforms any high-impedance 1/4" source into a low-impedance signal, ready to be sent long distances to a mixing board or recording console. Housed in a rugged metal casing that will survive the rigors of the road, the unit features a high quality transformer, a ground lift switch, and does not require batteries or phantom power to function. The direct box is perfect for bass/acoustic guitar, keyboards and DJ equipment.