400W Stereo Amplifier Circuit using STK4050

Introduction

In the world of audio enthusiasts, achieving high-quality sound with substantial power output is a pursuit of perfection. Whether you’re setting up a home theater system or a powerful stereo for your music room, having the right amplifier can make all the difference. In this article, we will explore a 400W Stereo Amplifier Circuit Diagram using dual STK4050 ICs. This circuit promises to deliver exceptional audio performance with the capability to drive even the most demanding speakers. Let’s dive into the details of this 400w stereo amplifier circuit and the specifications of the STK4050 IC.

The heart of any powerful amplifier lies in its ICs, and the STK4050 is no exception. This IC is renowned for its reliability and impressive audio performance. Here are the specifications of the STK4050 IC:

STK4050 IC Specifications:

Maximum Power Output: 200W
Total Harmonic Distortion: 0.08% (at 20Hz – 20kHz)
Frequency Response: 5Hz – 50kHz (-3dB)
Input Sensitivity: 1.0V RMS
Operating Voltage: ± 63V Max.
Recommended Heat Sink: 0.7°C/W
Dimensions: 49.5mm x 38.0mm x 10.4mm (H x W x D)

400W Stereo Amplifier Circuit Diagram using STK4050

This 400W stereo amplifier circuit can be built using basic components with the main STK4050 IC. The circuit diagram of this audio amplifier circuit project is shown below.

Power Supply Circuit Diagram

STK4050 IC Dimensions

More Circuit Layouts

Components List of 400W Stereo Amplifier Circuit

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

• STK4050 IC x 2
• 0.22 ohms 5 watts Resister x 8
• 1k Resister x 4
• 4.7k Resister x 4
• 56k Resister x 4
• 100 ohms Resister x 4
• 560 ohms Resister x 2
• 10k Resister x 2
• 4.7uF Capacitor x 2
• 100uF Capacitor x 4
• 470pF Capacitor x 2
• 100pF Capacitor x 2
• 1000pF Capacitor x 4
• 10uF Capacitor x 2
• 1uF Capacitor x 2
• 0.1uF Capacitor x 2
• 3uH Coil x 2 (Not shown in the layout for output to speaker with 4.7k resisters)
• Power Supply +/- 24V to 63V 3A Dual Supply

Follow this Link of schematic for connections 3uH Coil and 4.7k resister in parallel in the output to the speaker.

Explanation of 400W Stereo Amplifier Circuit using STK4050

Now, let’s explore the circuit diagram for the 400W Stereo Amplifier using dual STK4050 ICs:

This circuit utilizes two STK4050 ICs, providing a total power output of 400W (200W per channel). The circuit includes power supply components, input and output capacitors, and appropriate resistors to ensure proper biasing and stability.

Key Features of the Circuit:

• High Power Output: With 400W of combined power, this amplifier can fill even large rooms with crystal clear sound.
• Low Distortion: The STK4050 IC’s low THD ensures minimal distortion, resulting in clean and accurate audio reproduction.
• Wide Frequency Response: The amplifier can handle frequencies from 5Hz to 50kHz, capturing the full spectrum of audio.
• Compact Design: The compact size of the STK4050 IC allows for space-efficient amplifier construction.

Conclusion

Building a 400W Stereo Amplifier Circuit with dual STK4050 ICs is a fantastic choice for audiophiles and music enthusiasts looking for powerful, high fidelity sound. The STK4050’s impressive specifications, combined with the well-designed circuit, ensure outstanding audio performance. Whether you’re enjoying music or immersing yourself in a cinematic experience, this amplifier will not disappoint.

Incorporate this circuit into your audio setup and experience the power and clarity that the STK4050 can deliver. Elevate your audio experience to new heights with this exceptional amplifier circuit.

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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!

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