Audio power amplifier:
This is the audio power amplifier circuit diagram. It’s a stereo circuit diagram. Each side can make 100 watts. we can use 25-0-25 voltage to 50-0-50 voltage. We can use any PNP and NPN transistors. here used 2sc5200 and 2sa1943. This pair can make 100 watts.

Here is the best transistor amplifier circuit diagram
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Details about 2SC5200
2sc5200 Polarity is NPN. The maximum collector power dissipation is 150 Watts. The maximum collector-base Voltage is 250 volts. Max Collector-Emitter Voltage is 250V. The Maximum Emitter-Base Voltage is 5V. The Maximum Collector Current is 17 amperes.
Details about 2SA1943
2sa1943 Polarity is PNP. The maximum collector power dissipation is 150 Watts. The maximum collector-base Voltage is 250 volts. Max Collector-Emitter Voltage is 250V. The Maximum Emitter-Base Voltage is 5V. The Maximum Collector Current is 17 amperes.

This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. If the amplifier has any problems, this circuit can save our soundbox. Normally, when the transistor makes a short circuit, the voltage comes out from the speaker output line, and this circuit protects that voltage. This circuit should not allow direct voltage to be sent to the speaker. This circuit is essential for protecting the speaker.

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