Transforms any high-impedance 1/4" source into a low-impedance (XLR) signal ready to be sent long distances to a mixing board or recording console Passive design features a high quality transformer, ground lift switch, and does not require batteries or phantom power Perfect for ...Transforms any high-impedance 1/4" source into a low-impedance (XLR) signal ready to be sent long distances to a mixing board or recording console Passive design features a high quality transformer, ground lift switch, and does not require batteries or phantom power Perfect for bass/acoustic guitar, keyboards, and DJ equipment Ground lift switch The DB500 Direct Box transforms any high-impedance 1/4" source into a low-impedance (XLR) signal ready to be sent long distances to a mixing board or recording console. Its passive design features a high quality transformer, ground lift switch, and does not require batteries or phantom power. Perfect for bass/acoustic guitar, keyboards, and DJ equipment.