100W complementary power amplifier

Today I accidentally found this picture on my hard drive. It turns out that it has the same circuit as the amplifier I use. I am posting it now for everyone to see.

This circuit has a symmetrical structure and requires no complicated debugging process except matching the amplification factors of the transistors.

This circuit requires that there must be an isolation capacitor at the audio source output, otherwise a short circuit may occur. The improvement method is very simple, just add an isolation capacitor at the input stage, and a 10 microfarad 50V electrolytic capacitor is suitable.

The capacitor in the circuit must withstand a voltage of at least 50V.