The LD Systems LDI02 Active is an active DI box that converts high-impedance, unbalanced signals (like those from electric guitar or keyboards) into low-impedance, balanced signals — suitable for connection to mixers or PA systems. It features XLR and 6.3 mm jack inputs, a balanced XLR output, a link (thru) output, a −20 dB pad for handling hot signals, and a ground lift switch to reduce hum. Power can be supplied via a 9V battery or 48V phantom power; when phantom power is used the battery is automatically disabled and this is shown by a constant LED indicator. The build is rugged, with metal housing and protective corners, and it has very low power consumption.