DI INJECTION BOX With the bus-powered MDB-USB Stereo DI, the days of relying on your headphone jack to get audio from a computer into analog equipment are over. By combining a high-resolution audio interface with a noise-free, distortion-free stereo DI, MDB-USB converts your digital audio into clean, balanced stereo output. With output level control, headphone output and mono summing for maximum versatility. The analog outputs are dual XLR with ground lift.