Introduction
Power amplifiers are essential components of audio systems since they amplify the low-level signals to high levels to drive speakers. A 500W power amplifier circuit is an ideal design for these applications. This kind of amplifier makes it possible for the system to produce sound that is loud enough to be heard in large spaces. This article will discuss the 500W power amplifier circuit using 5 x 2SC5200, 5 x 2SA1943, D718, B688, TIP42, A1015 and C1815 transistors.
The amplifier circuit uses five pairs of 2SC5200 and 2SA1943 power transistors. Each pair of transistors is connected in a push-pull configuration. The push-pull configuration provides a higher power output than the common emitter configuration that is generally used in small scale amplifiers.
Circuit Diagram
of 500W Power Amplifier Circuit
This amplifier can be designed using a few basic components. The circuit diagram of this project is shown below.
NOTE: Correction of R26 (150 ohm) connected from emitter to collector of Q9 (C2229), will be connected from emitter to -75VDC.
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Explanation of 500W Power Amplifier Circuit
The transistors used in this amplifier circuit are known for their high current gain, high power handling capability and thermal stability. The transistors D718 and B688 are used as drivers to drive the output transistors. These drivers have enough current capability to drive the base of the output transistors.
The amplifier circuit has a power supply section that provides the required DC voltage to operate the amplifier. The power supply uses a low-loss rectifier with a filter capacitor that provides a stable DC voltage.
Conclusion of 500W Power Amplifier Circuit
The power amplifier circuit using 5 x 2SC5200, 5 x 2SA1943, D718, B688 transistors is an excellent choice for applications that require high power output. The amplifier can drive large speakers with ease and provide excellent sound quality. The amplifier circuit is built using high-quality components that provide excellent thermal stability, which is essential for power amplifiers.
The use of five pairs of transistors in a push-pull configuration ensures that the amplifier has a high output power. The drivers used in the circuit have an adequate current capability to drive the transistors’ base, thereby ensuring that the transistors operate in their active region.
In conclusion, the power amplifier circuit 2SC5200, 2SA1943 transistors provides excellent sound quality and high power output, making it an ideal choice for audio applications that require high-quality sound.
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For more project and circuit diagrams, you can go through the Schematics in the main menu where you can find many interesting projects and circuit diagrams like audio amplifier circuits, voltage booster circuit, battery charger circuit and timer circuits etc., which are all beginner circuit projects. Feel free to check them out!

Muito bom e objetivo o assunto amigo profissional..!
Muito obrigado amigo!
We buy kit power amp,
50w,
100w
200w
400w
500w
100w
Sorry we don’t sell here.
Hello, I would be extremely grateful if someone could send me this diagram as a document, not as a picture, ideal for finishing so that I don’t have to redraw the whole thing