LA4440 Stereo Amplifier Circuit Diagram


In the realm of audio amplification, the LA4440 Stereo Amplifier Circuit Diagram stands as a testament to the pinnacle of engineering prowess. The LA4440 is an integrated circuit (IC) specifically designed for stereo amplification, offering exceptional audio quality and impressive power output. This article delves into the intricacies of the LA4440 Stereo Amplifier Circuit Diagram, providing readers with a comprehensive understanding of its inner workings, specifications, and applications.

The LA4440 IC

The LA4440 IC is an Audio Power Amplifier with built-in two channels that can deliver up to 6 Watts of power per channel, making it a popular choice among audio enthusiasts and hobbyists alike. Manufactured by Sanyo, the LA4440 is specifically designed for stereo applications, accommodating a wide range of audio sources while maintaining exceptional audio fidelity.

Specifications of the LA4440 IC

  • Power Output: 6 Watts per channel (4-ohm load, 12V power supply)
  • Package Type: SIP 12 PIN
  • Supply Voltage: 12V DC
  • Total Harmonic Distortion (THD): 0.2%
  • Frequency Range: 20 Hz to 20 kHz
  • Operating Temperature Range: -10 ˚C to 75 ˚C
  • Dimensions: 9.5mm (H) x 17.9mm (W) x 11.6mm (D)

LA4440 Stereo Amplifier Circuit Diagram

The LA4440 Stereo Amplifier Circuit Diagram features a straightforward design that is easily understood and implemented. The following diagram illustrates the key components of the circuit: This project can be built using a few basic components.

LA4440 Stereo Amplifier Circuit Diagram
LA4440 Stereo Amplifier Circuit Diagram

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Components List of LA4440 Stereo Amplifier Circuit

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

  • LA4440 IC x 1
  • 100uF Capacitor x 5
  • 220uF Capacitor x 2
  • 4.7uF Capacitor x 2
  • 2.2k Resister x 2
  • 2-Pole Terminal Block (optional) x 1
  • 4 ohms 6 to 10 watts speaker x 2
  • MP3 Player (optional)
  • 12 Volts Power Supply

Explanation of LA4440 Stereo Amplifier Circuit

  1. Power Supply: The LA4440 IC operates on a 12V DC power supply. It is imperative to use a regulated power supply to ensure optimal performance and protect the IC from potential damage.
  2. Input Stage: The audio input signals are fed into the IC through the IN1 and IN2 pins. These signals are then amplified by the internal amplifier stages of the LA4440.
  3. Volume Control: The potentiometer or the touch sytem of mp3 is employed to adjust the volume levels of the audio output. This control allows users to fine-tune the audio output to their desired levels.
  4. Output Stage: The amplified audio signals are routed through the speaker output. The use of appropriate speakers with compatible impedance ratings (4 ohms) is essential to achieve the best audio quality.
  5. Bass Boost Control: The LA4440 IC features a built-in bass boost control. By connecting the Bass Boost pin to ground or the center tap of VR, users can enhance the low-frequency response and add depth to the audio output.
  6. Protective Components: The circuit is further enhanced with protective components such as resistors, capacitors, and diodes. These components safeguard the IC and the connected speakers from potential electrical surges and transient events.


The LA4440 Stereo Amplifier Circuit finds numerous applications in various audio systems. Some notable applications include:

  1. Personal Audio Systems: The LA4440 IC, with its compact size and impressive power output, can be used in personal audio systems such as boomboxes, portable speakers, and soundbars.
  2. Home Theater Systems: The LA4440 can serve as the core amplification unit in a home theater system, providing high-quality audio amplification for multiple channels.
  3. Car Audio Systems: The LA4440 IC’s low power consumption and compact design make it an ideal choice for upgrading the audio capabilities in car audio systems, delivering immersive audio experiences on the go.
  4. Public Address Systems: The LA4440’s powerful audio amplification capabilities make it suitable for public address systems, ensuring crystal-clear audio quality in public spaces and venues.


The LA4440 Stereo Amplifier Circuit represents the culmination of advanced audio engineering principles, offering exceptional audio amplification capabilities in a compact package. Its impressive power output, remarkable audio fidelity, and versatile applications make it a highly sought-after choice for various audio systems. With the knowledge gained from this article, you are equipped to embark on your journey of implementing the LA4440 Stereo Amplifier Circuit, bringing incredible audio experiences to life.

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Stereo Amplifier Circuit Diagram using LA4440 IC
LA4440 Stereo Amplifier Circuit Diagram

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