Input Impedance : 1M OMEGA Out put Impedance : 1 k OMEGA Recommended load Impedance : 10k OMEGA or greater Residual Noise : -105dBu (IHF-A, TYP.) Jack : Input, Output , AC Adaptor Power Supply : DC 9V ; Dry battery (6F22/9V ), AC adaptor Controls : Swith, Level, Low Knob, High knob, Dist knob, Middle, Freq knob