Input:3.5mm mini-jack, unbalanced stereo combined to mono Input Level:-10 dBV, +22 dBu max Format-A Signal Pair Used:Switch-selectable A, B, or C (rear-panel switch) Format-A Input:RJ45 TP CABLE Ouput:RJ45 TP CABLE, RDL TP Format-A Frequency Response:20 Hz to 20 kHz (±0.5 dB) THD:< 0.1% (50 Hz to 20 kHz); <0.001% (1 kHz typ) Power Requirement:Passive Dimensions:1.6" (4.06 cm) W; 4.11" (10.45 cm) H; 1.89" (4.8 cm) D