Taken from the specifications page of the service manual.
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Analog
Input sensitivity/Input impedance : 200 mV/47 kΩ
Frequency response : 10 Hz – 100 kHz — +1, –3 dB (DIRECT mode)
S/N : 102 dB (IHF–A weighted, DIRECT mode)
Distortion : 0.005 % (20 Hz – 20 kHz) (DIRECT mode)...