Do you have a question about the Sanyo JA 20 and is the answer not in the manual?
Continuous output power, total harmonic distortion, frequency response, and tone control.
Input sensitivity, impedance, overload levels, and output levels.
High filter, loudness control, and signal-to-noise ratio.
Power requirements, consumption, dimensions, and weight.
Note on IHF measurement standards for specifications.
Step-by-step guide for adjusting the bias.
Procedure for calibrating the peak level meter.
Step-by-step instructions for removing the front panel.
Procedure for fitting the LED meter PCB assembly.