REGA - Fono MM (Black) A Superb Sounding Outbaord Phono Preamplifier All-discreet operation in an extruded aluminum chassis Input sensitivity: 3mV for 200mV output Frequency response (50KW load): 17Hz (-3dB) to 100KHz (-0.2dB) RIAA accuracy (50KW load): +/-0.2dB 100Hz to 100KHz