DIY LA4440 bass amplifier homemade

In this video i am showing, how to make extreme powerful DIY LA4440 Bass amplifier homemade with heavy bass, treble, volume controllers (tone control) and MP3 player with Bluetooth kit. You can play music with your mobile after synchronizing it with Bluetooth. You also can use USB device and SD card as well. This is a single channel mono amplifier. You can make another duplicate copy of it, if you want to convert it into stereo amplifier. For two channels stereo amplifier, you will have to replace the three single potentiometers with dual pole potentiometers and repeat the same components for the other layer. A simple and easy Stereo Tone Control Project is already here for reference where you can follow instructions.

LA4440 Bass Amplifier diy Homemade with Tone Control MP3
LA4440 Bass Amplifier Homemade with Tone Control MP3

Circuit diagram

Following is the circuit diagram of LA4440 mono amplifier of 19 watts with volume, bass and treble. This circuit diagram uses minimum components and its very easy to assemble for beginners and students.

LA4440 Bridge Amplifier Circuit Diagram with Tone Control & MP3
LA4440 Bass Amplifier Homemade Circuit Layout with Tone Control & MP3

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DIY LA4440 Bass Amplifier Homemade Circuit Diagram
DIY LA4440 Bass Amplifier Homemade Circuit Diagram

List of components

used in DIY LA4440 bass amplifier

  • LA4440 IC x 1
  • 100uf capacitor/25v or 35v x 3
  • 47uf capacitor/16v x 2
  • 100k resistor x 1
  • 680 ohms resistor x 1
  • 50k potentiometer x 3
  • 104pf capacitor x 4
  • 1k resistor x 1
  • 2.2k resistor x 1
  • MP3 player kit with bluetooth
  • 12 volts single power supply
  • Speakers 4 ohms.

Development images

of DIY LA4440 bass amplifier

Solder 100uf capacitor’s negative to Pin.12 of LA4440 IC & positive to pin.13 of IC. Again 100uf capacitor’s positive to pin.9 of IC & negative to pin.10 of IC. Again, another 100uf capacitor’s positive to pin.5 & negative to pin.6. Now 47uf capacitor’s positive to pin.7. Then again 47uf capacitor’s positive to pin.1. Now join Negative pins of both 47uf capacitor together.

DIY LA4440 Bass Amplifier Image1

Take one 680 ohms resister and connect one end to pin.3 of LA4440 IC and the other end to the joint of both 47uf capacitors. Connect one end of 100k resistor to pin.2 of LA4440 IC.

DIY LA4440 Bass Amplifier Image2

Attaching tone control:

Now, complete the circuit of volume-bass-treble as per the following image. I have already made this project separately. A separate post/article is already available on this site. If you want to see the complete information including video then visit my another article.

DIY LA4440 Bass Amplifier Image3

Now its time to connect the power supply. The positive (red) will go to pin.11 and negative (black) will go to pin.14 of LA4440 IC. Now connect and solder the two wires of speaker. One will be soldered to pin.10 and the other will soldered to pin.12 of LA4440 IC.

DIY LA4440 Bass Amplifier Image4

Attaching blue tooth:

Moreover, an MP3 player kit is also added which allows the users to use USB flash drives/devices, Memory cards, and their mobile phones. Besides this, my designed amplifier has the Bluetooth facility as well, you can wirelessly connect your smart phone with the amplifier and play your favorite music

Attach MP3 player kit and supply 5 volts DC to it. If you want to convert 5v from 12 volts of this amplifier, you will have to use LM7805 regulator IC. For more information on how to convert 12v into 5v, you can watch this video. Now attach the output connection of MP3 kit to amplifier. Attach left & right or only one of them to pin.1 of bass controller. Ground wire will go to pin.3 of volume controller.

DIY LA4440 Bass Amplifier Image5

Testing project:

Use USB device, SD card or synchronize your mobile phone with bluetooth. Play music and enjoy the project. Also thank you so much for visiting the Tronicspro Website.


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10 comments on DIY LA4440 bass amplifier homemade

  1. Bom dia eu tenho 2 transistor A1941 e 2 transistor C5198 gostaria de saber como eu posso fazer um amplificador usando esses transistor ? Sera que vc poderia me ajudar

    1. Vi um vídeo do transistor único da A1943. Você pode pesquisar e substituir por A1943 ou outro, porque todos são transistores PNP.
      Obrigado por assistir e comentários.

  2. Sir in my stereo amplifier, two LA 4440 ic were used for left and right channels. But when touch or giving signal in the pin 2 of one ic both the speaker gives output. How to solve this problem. Help me to enjoy stereo effect

    1. Its not possible if you are using dual potentiometers and giving two separate input. You are doing something wrong.

  3. Am Stanley Moseti please am requesting the circuit diagram and full drawing on how to attach mp3 kit to the amplifier plz I need it because am working on it

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