HIFI Headphone Amp 4 transistors - One MOSFET + BD139/140

This headphone amplifier should suit impedances 8-600 Ohm.
The distortion is very low. It could be called HiFi.
Potentiometer to adjust output to 5.50 Volt.
The bias should be like 100 mA.
Supply is 12 Volt DC.

One Watt simple_04 Headphone.jpg
 
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