Re: uBitxr4 audio distortion fix


This amp works very well, with very low distortion.

I have built this amp to verify, it but note the voltage range up to 12v. I found the final pair can get very hot over 12v.  Possibly some re-biasing of the first stage might help that. Or use a BD139/140 pair in the output stage.  I got around 600mW out into 10R resistive load with 240mVrms input which is the max my audio gen will give.


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