600-watt amplifier circuit diagram using 2SC2922:
This is a 600-watt amplifier circuit diagram using 2SC2922 transistors. here use the same transistors. All are NPN positive transistors. This circuit needs dual voltage: positive, negative, and ground voltage. We can use 25-0-25 voltage to 80-0-80 voltage.

2sc2922 trnsistor
Type: NPN bipolar power transistor
Package: TO-3P / MT-200
Designed for: High-power audio amplification
Commonly used in: Hi-Fi amps, PA systems, power amplifiers
Key Electrical Specs (typical)
Collector-Emitter Voltage (Vceo): 180 V
Collector Current (Ic): 17 A
Power Dissipation: ~200 W (with proper heatsink)
Gain (hFE): 55–160
Transition Frequency (ft): ~30 MHz
we also can also use another transistor. like 2sc5200. Any NPN transistor can be used in this circuit diagram.


2sc5200 Polarity is NPN. Max Collector Power Dissipation is 150 Watts. The Max Collector-Base Voltage is 250 Voltage. Max Collector-Emitter Voltage is 250 Voltage. The Max Emitter-Base Voltage is 5 Voltage. Maximum Collector Current is 17 amperes.
2sa1943 Polarity is PNP. The Maximum Collector Power Dissipation is 150 Watts. The Maximum Collector-Base Voltage is 250 Volts. The Maximum Collector-Emitter Voltage is 250 Volts. The Maximum Emitter-Base Voltage is 5 Volts. The Maximum Collector Current is 17 amperes.
DIY amplifier circuit diagram using transistors:
This is the DIY amplifier circuit diagram using transistors. This circuit can deliver up to 300 watts. It’s a mono circuit board. For a stereo have to use 2 boards. Here, use PNP and NPN transistors. Any transistor can be used in this circuit. The supply should be a minimum 25-0-25 voltage and a maximum 80-0-80 voltage.
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