Power Amplifier Circuit Featuring Active Tone Control Utilizing 2N3055 Transistors

Overview

Power amplifiers play a crucial role in audio systems as they enhance the power of the audio signal prior to its delivery to the speakers. A prevalent type of power amplifier circuit features active tone control, enabling users to modify the frequency response of the audio signal.

The amplifier circuit designed for active tone control incorporates 2N3055 transistors in the output section, along with 2N3904 and 2N3906 in the driver section, and C1815 in the preamplifier section. This configuration is favored by DIY audio enthusiasts.

Specifications of the transistors utilized in the power amplifier circuit:

2N3055:

NPN transistor
Maximum collector current: 15A
Maximum power dissipation: 115W

2N3904:

NPN transistor
Maximum collector current: 200mA
Maximum power dissipation: 625mW

2N3906:

PNP transistor
Maximum collector current: 200mA
Maximum power dissipation: 625mW

C1815:

NPN transistor
Maximum collector current: 150mA
Maximum power dissipation: 400mW

Amplifier Circuit Schematic Featuring Active Tone Control

This project can be constructed with several fundamental components. The circuit schematic for this project is illustrated below.

Power Amplifier Circuit with Active Tone Control Schematic Diagram

12V power supply with a single pole schematic diagram

Caution: This website has information about high voltage circuits. You should proceed with care, make sure you know what you're doing, and take all necessary safety steps to avoid getting shocked or injured.

List of Components for Power Amplifier Circuit Featuring Active Tone Control

Below is the comprehensive list of components utilized in this project:

4 x 2N3055 Transistors
1 x 2N3904 Transistor
1 x 2N3906 Transistor
1 x 2SC1815 Transistor
4 x 0.33/5W Resistors
3 x 47Ω Resistors
1 x 470Ω Resistor
1 x 15Ω Resistor
2 x 2.2k Resistors
3 x 4.7k Resistors
1 x 33k Resistor
1 x 330k Resistor
1 x 1k Resistor
2 x 100Ω Resistors
3 x 50k Potentiometers
1 x 4700uF Capacitor
4 x 10µF Capacitors
2 x 47µF Capacitors
1 x 68nF Capacitor
2 x 2.2nF Capacitors
2 x 1N4001 Diodes

Overview of Power Amplifier Circuit Featuring Active Tone Control

The 2N3055 transistor is a robust NPN transistor that can manage up to 15A and 115W of power, making it well-suited for the output stage of the amplifier. In contrast, the 2N3904 and 2N3906 transistors are utilized in the driver stage to deliver the required amplification of the input signal. Finally, the C1815 transistor is employed in the preamplifier stage to enhance the signal further before it proceeds to the driver and output stages.

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