Do you have a question about the Technics SU-9070 (X) and is the answer not in the manual?
Input signal level and impedance for various sources.
Distortion level at rated output.
Signal-to-noise ratio at rated output.
Distortion across audio frequencies.
Range of frequencies reproduced.
Output signal level and impedance.
Electrical power usage.
Voltage and frequency requirements.
Physical size of the unit.
Unit mass.
Description of controls on the front of the unit.
Description of input/output jacks on the rear.
Procedure for adjusting power supply voltage.
Procedure for balancing DC voltages.
Steps for power supply voltage adjustment.
Steps for DC voltage balance adjustment.