I choose this, a simple stereo amplifier circuit diagram of 19 x 19 watts using dual LA4440 IC from Sanyo company. It uses minimum components to complete the circuit. Because LA4440 bass amplifier DIY is a low cost and a high quality circuit, it is ideal for beginners. The IC has built-in protection of short circuit, thermal and over voltage, so it is quite safe.
Demonstrating here, how to make extreme powerful stereo LA4440 bass amplifier DIY.I have assembled this circuit on a high quality of PCB which was ordered from JLCPCB.
Given below is the circuit diagram of dual LA4440 bass stereo amplifier with volume, bass and treble controllers. The amplifier provides high bass and its ideal for bass lovers. Now You can click on the image to open it in a light box then click the “Download” button to download the circuit diagram into your computer’s disk.
I have also designed and demonstrated the same circuit but for single channel mono amplifier without PCB and it is already available on this site. You can make an additional duplicate copy of the amplifier, if you want to convert it into dual channel stereo. I attached MP3 player with him, so beginners can easily understand that how to build it. I have written a complete article with development images. Video is also available showing the entire process. If you want to visit the post then click the link LA4440 bass amplifier.
Print circuit boards (PCB)
for LA4440 bass amplifier DIY
Following is a front side view of PCB image taken from gerber file. You can also re-print the file or you can order it from JLCPCB for your own project. I have already provided a clickable link of gerber file end of the article in list of components section, so you can download it very easily.
Below image shows the rear view of PCB of this project. The PCB uses two layers in circuit and they joined each other internally. Because the stereo board is designed compact within 4 inch x 4 inch size, so it can be fit in small box and doesn’t require large space.
This PCB is designed in 3 layers. You can see both upper and bottom layers at a glance in the following print. You can download and print it very easily because the image is clickable. Approximately all the images at this site in all articles are clickable, so you can easily download at any time.
JLCPCB company has delivered this package box via DHL shipment where I received 5 nos of PCB in just $2 and received within a week time.
In the following image, I soldered all components without 4 transistors and 2 large capacitors. It is not shown here because they fall down during soldering. So I will solder them separately.
On this stage I have soldered all parts and only the heat sink installation is remaining. So I will fix it and it is ready to use.
List of components
used in LA4440 bass amplifier DIY
- LA4440 ic x 2
- Capacitor 2200uf 25v x 2
- Capacitor 470uf 35v x 4
- Capacitor 47uf 25v x 4
- Capacitor 100uf 35v x 2
- Capacitor 1uf 50v x 2
- Capacitor 104J x 8
- Resistor 220 ohms x 2
- Resistor 1k x 4
- Resistor 2.2k x 4
- Dual potentiometer 50k x 3
- 2 Pin terminal blockr x 3
- 3 Pin terminal block x 1
- Heat sink x 1
- PCB x 1
- Power supply 12 volts dc
- Speaker 4 ohms
- Download gerber file here