In this video i am showing, how to make extreme powerful DIY LA4440 Bass amplifier homemade with heavy bass, treble, volume controllers 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.
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.
of DIY LA4440 bass amplifier
Solder 100uf capacitor’s negative to pPin.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 4.7uf capacitor’s positive to pin.7. Then again 4.7uf capacitor’s positive to pin.1. Now join Negative pins of both 4.7uf capacitor together.
Take one 680 ohms resister and connect one end to pin.3 of LA4440 IC and the other end to the joint of both 4.7uf capacitors. Connect one end of 100k resistor to pin.2 of LA4440 IC.
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 [click here].
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.
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 information of how to convert 12v into 5v [click here]. 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.
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.
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.
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