100W Audio Amplifier Circuit using TIP3055


In the world of audio amplifiers, high power options are always in demand. If you are searching for a circuit that can provide a whopping 100 watts of audio power, then you have come to the right place. Introducing a cutting-edge 100w audio amplifier circuit capable of delivering an outstanding output power of 100 watts for a single channel. This audio amplifier circuit utilizes the top-notch power transistors TIP2955 and TIP3055 as its core components. To ensure optimal performance, this amplifier is designed to operate with a symmetrical / dual polarity power supply, providing a voltage output range of 24V to 32V. It boasts compatibility with a wide range of loudspeakers, ranging from 4 to 16 Ohms. For those seeking a stereo sound system experience, simply replicate the circuit design and employ a robust 5A transformer to power both amplifiers simultaneously.

100W Audio Amplifier Circuit Diagram

This project can be designed using a few basic components. The circuit diagram of this project is shown below.

100W Audio Amplifier Circuit using TIP3055
100W Audio Amplifier Circuit using TIP3055
Power Supply Circuit Diagram for 24v amplifier circuit
24V Power Supply Circuit Diagram

More Circuit Layouts

Transistors Pinout

TIP3055 Pinout
2n3904 2n3906 Pinouts
2N3904 & 2N3906 Pinouts

Components List of 100W Audio Amplifier Circuit

Following is the list of all components used in this project:

Introduction to Output Transistors:

Before we dive into the working of the audio amplifier circuit, let’s take a closer look at the TIP3055 and TIP2955 transistors used in the output section. These are high-power NPN and PNP transistors, respectively, capable of handling significant currents and voltages.

TIP3055 transistor

The TIP3055 transistor is widely known for its robustness and ability to handle high collector current up to 15A, making it an ideal choice for high-power applications. Its continuous collector-emitter voltage rating is 60V, which ensures safe operation under various load conditions. The TIP3055 transistor’s high current gain (hFE) is also an advantageous characteristic for audio amplifiers.

TIP2955 transistor

On the other hand, the TIP2955 transistor is its PNP complement, offering similar characteristics to the TIP3055 but with reversed current flow. With a maximum collector current of 15A and a collector-emitter voltage rating of 60V, the TIP2955 perfectly complements the TIP3055 in the output section, allowing the amplifier to produce a balanced audio output.

Working of the 100W Audio Amplifier Circuit:

The 100W audio amplifier circuit is designed to deliver high-quality audio output with minimal distortion. The driver and audio sections employ 2N3904 and 2N3906 transistors, respectively. These transistors are commonly used in small signal amplification applications and have excellent performance characteristics.

The driver stage, consisting of the 2N3904 transistor, provides the necessary amplification to drive the output transistors. It ensures the accurate reproduction of the audio signal with low noise and distortion. The amplified signal from the driver stage is then fed to the audio section, which utilizes the 2N3906 transistor. This transistor helps to further amplify the signal and provide sufficient power to drive the output transistors.

In the output section, the TIP3055 and TIP2955 transistors are configured in a complementary push-pull arrangement. This configuration allows the circuit to deliver high power with improved efficiency. The output transistors are driven by the amplified audio signal, and they work together to produce a powerful audio output of 100 watts.


In conclusion, the 100W audio amplifier circuit using TIP3055 and TIP2955 transistors in the output section and 2N3904 and 2N3906 transistors in the driver and audio sections is a powerful solution for audio enthusiasts. The robustness and high power handling capabilities of the TIP3055 and TIP2955 transistors ensure reliable and distortion-free audio reproduction. The amplification provided by the 2N3904 and 2N3906 transistors allows for accurate signal replication and sufficient power delivery. By combining these components in a well-designed circuit, you can enjoy an excellent audio experience with 100 watts of power, making it an ideal choice for various audio applications.

More projects, You may like:

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 circuitbattery charger circuit and timer circuits etc., which are all beginner circuit projects. Feel free to check them out!

100W Audio Amplifier Circuit using TIP3055
100W Audio Amplifier Circuit using TIP3055

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