This unit accepts 3 RCA inputs from a head unit Front, Rear, and Subwoofer and provides 3 amplified outputs for each input; 3 front outputs, 3 rear outputs, 3 subwoofer outputs. Input Impedance: 47K Ohms Input Sensitivity: 260mV S/N Ratio: >95dB Output Level (10KHz): >1V (1KHz) Output Impedance: 1K Ohms Channel Resolution: >60dB Harmonic Distortion: 0.009% Frequency Response: 20-20KHz Output Gain: 12Db