MatchPAK MKII is a bi-directional stereo analog interface that connects unbalanced semi-pro equipment to professional balanced line levels. It provides balanced input to unbalanced output attenuation and unbalanced input to balanced output gain, with nominal 14 dB conversion in each direction and front-panel multi-turn presets. The unit features four Neutrik balanced connectors, four RCA unbalanced sockets, a UK mains input with supplied lead, and standard rack-mount hardware.