I haven't done a bad job for this amplifier circuit since I got it to work with 470K for RV and 10K for RG but what I'd like to do is create a better quality sound output. Maybe my 1/2 watt 8-ohm speaker is to blame but who knows.
So anyway, I tried a stiffer ratio and used 10K for RV and 10K for RG and I get no sound output. I notice I don't get any sound output for any values of RG until I make RV substantially high (like 470K)
Given the components I chose in this circuit and given each audio device is 8-ohms, how do I calculate the optimal values for RG and RV? I'm trying to avoid the need of tuning multiple potentiometers in the future as I will make multiple sound units later on.
For my tests, AMP_PWR is VCC and VCC is 5V. later on I may make AMP_PWR a higher voltage.