How do I test an audio amplifier using a signal generator? For example, I would like to input a 440 Hz sine wave and
- listen to the speaker output at various configurations of volume, etc.
- watch the speaker output signal on an oscilloscope
and measure the frequency at which the subwoofer filter takes effect.
Specifically, what voltage/amperage is appropriate for typical stereo hifi gear input? I plan to feed the input via the 1/8'' stereo input jack.
Context: this is primarily for my own education and understanding. The only practical aspect will be verifying the subwoofer low pass filter setting, which is controlled by a potentiometer.