PRE 1 INSTALL GUIDE Specifications Input Sensitivity/Impedance Mic Phono Tape,Tuner, CD/DVD, Aux 0.5V/600 Ohms 3mV/47k Ohms 150mV/47k Ohms Output Level/Impedance Tape Rec Pre Output 150mV/100k Ohms 500mV/47k Ohms Total Harmonic Distortion Mic Phono Tape,Tuner, CD/DVD, Aux less than 0.4% less than 0.4% less than 0.