Introduction
In our tutorials and articles, we have widely discussed many types of amplifier circuits. Here we are again with another audio amplifier circuit for the loud output audio. As we already know that basic operation of an audio amplifier is to boost up the weak input audio signal at the output side.
A microphone circuit is maybe the easiest example to understand the audio amplifiers. But for the good loud audio at the load side, they have come up with a new amplifier circuit. So, in this tutorial, we are going to “100 Watt transistor audio amplifier circuit”
Hardware Components
The following components are required to make Audio Amplifier Circuit
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | Transistor | BC108 | 2 |
| 2. | Transistor | 2N6107 | 2 |
| 3. | Transistor | 2N3773 | 2 |
| 4. | Transistor | 2N5294 | 1 |
| 5. | Speaker | – | 1 |
| 6. | Diode | 1N4007 | 2 |
| 7. | Electrolytic Capacitor | 1uF, 47uf.4.7uF | 1,1,1 |
| 8. | Resistor | 1Ω, 680Ω, 100Ω, 22Ω, 10KΩ, 4.7KΩ, 1KΩ, 47KΩ | 2,2,1,3,2,1,1,2 |
| 9. | Power Supply | 35V |
BC108 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of BC108
2N6107 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N6107
2N3773 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N3773
Audio Amplifier Circuit
Working Explanation
In this 100 Watt transistor audio amplifier circuit, there are seven transistors. Two of them (Q7, and Q6) are working as pre-amplifier. While from transistor Q1 to Q4, they are working as power stage transistors. In the end, there is a subwoofer loudspeaker wired as a load. Hence this circuit needs a dual power supply of 35V. The circuit produces better impedance at both input and output. At the input, do not give high voltages. Also, check the maximum and minimum audio input range.
Application and Uses
- In-home audio systems
- For Hi-Fi devices
- In the Toys
- Can be used in Military equipment
- In robotic circuits
