Input & sensitivity
The inputs of the amps, should optimally be selected so thet the signal is around 4V peak to peak at maximum volume. By selecting the input and feedback resistor combination you can vary the input sensitivity.
First thing is then to determine what signal your source has. I will try to collect some data here or under Masurement techniques, but please feel free to add some values / standards / conventions...
- My Soundblaster Zen MP3 player outputs at most 1.6V ptp.
- My Juli@ soundcard peaks well above 10V ptp.
- Stationary CD players, 2V RMS / 5V ptp
If you havn't built it you do not really own it