Audio circuit diagram USA technology

Electronics Help Care January 4, 2026 Amplifier Diagram

Audio circuit diagram USA technology:

This is an audio circuit diagram from USA technology. This circuit can make 250 watts of output. 50-0-50 voltage 5 amperes. In this circuit, 4 transistors are used. Every transistor can take 1.3 amperes. 4 X 1.3 = 5.2 amperes. For this, we can’t use more than 5 amperes. The maximum DC voltage can be 75-0-75 voltage and 5 amperes. But the circuit requires 50-0-50 voltage and 5 amperes. So, 50 X 5= 250 watts.

The 2SC5200 (NPN) and 2SA1943 (PNP) are one of the most famous complementary transistor pairs in the world of high-fidelity audio. Originally designed by Toshiba, they are the “gold standard” for DIY and professional Class AB power amplifiers due to their high power handling and linear response.

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 Max Emitter-Base Voltage is 5V. The Maximum Collector Current is 17 amperes.

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 Max Emitter-Base Voltage is 5V. The Maximum Collector Current is 17 amperes.

DIY transistor amplifier circuit diagram using 2sc5200 and 2sa1943

200 watts audio amplifier circuit diagram using 2SC5200 and 2SA1943:

This is a 200-watt audio amplifier circuit diagram using 2SC5200 and 2SA1943. This circuit can make a maximum of 300 watts. We are using 50-0-50 voltage and 5 amperes. 50X5=250 watts. However, this circuit can operate perfectly with a 40-0-40 voltage and 5 amperes. 40X5=200 watts. Here needs to be dual voltage positive, negative, and ground voltage.