I am amplifying and audio signal with ac levels of around +-0.3V. This signal also has DC level of 1.2V I used 2 DC block capcitors because I saw the input should be ground referenced. The output of this circuit that I measured was for some reason also DC bias [even though I used a dc block capcitor aswell] but the sound was awful and I think it is because the output has lost all its negetive sound . Also first time I noticed this amp doesnt have -Vsupply but ground. I know it is also got truncate but I doubt thats the reason . I know there is FFT on the right side but this is not FFT of the audio its in time plain .
I thought maybe to lose the DC blocks in the input and to put 1 or 2 diode in series to lower the DC but I dont think it will end up well. Also thought to replace LM386 to LM370 but the input resistance is 2M . any solutions How can I get the negative part ?