Demonstrating here, how to make an extremely powerful stereo LA4440 bass amplifier DIY Homemade. I have assembled this circuit on a high-quality PCB which was ordered from JLCPCB.
Stereo amplifier history dates back to the 1950s when there was a huge surge in living room hi-fi systems. These amplifiers offered users increased sound fidelity and power to drive larger speakers as manufacturers worked to make listening experiences more enjoyable. Many classic designs have become cult classics among audiophiles, including units from brands like Marantz and Mcintosh. Over time, advances in electronics such as transistors and integrated circuits led to further refinements of these products, resulting in ever-increasing levels of accuracy and control. Nowadays, modern stereo amplifiers incorporate the latest technologies while maintaining their roots in the designs that made them popular, ensuring that they can still bring out the best in any audio system.
I choose this, 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 stereo homemade is a low-cost and high-quality circuit, it is ideal for beginners. The IC has built-in protection against short circuits, thermal, and overvoltage, so it is quite safe.
Given below is the circuit diagram of a dual LA4440 bass stereo amplifier with volume, bass, and treble tone controllers. The amplifier provides high bass and it’s 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 also designed and demonstrated the same circuit but for a 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 an MP3 player with him, so beginners can easily understand how to build it.
I have written a complete article with development images. A video is also available showing the entire process. Click the link LA4440 bass amplifier, If you want to visit the post.
Print circuit boards (PCB)
for LA4440 bass amplifier DIY
Assembling an amplifier on a two-layered printed circuit board (PCB) is a straightforward process, but one that needs to be done with precision. First, you’ll need to solder the necessary components onto the PCB, making sure all the joints are clean and properly insulated for safety reasons. After that, you’ll want to check for any potential short circuits that could damage your components. Then attach the power supply to the PCB as well as any connectors or additional equipment you may need. Finally, test each component thoroughly before fully powering up your new amplifier assembly – it’s always best to play safe!
Following is a front-side view of the PCB image taken from the 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 to the Gerber file end of the article in the list of components section, so you can download it very easily.
The below image shows the rear view of the PCB of this project. The PCB uses two layers in the circuit and they joined each other internally. Because the stereo board is designed to compact within a 4-inch x 4-inch size, it can be fit in a small box and doesn’t require a large space.
This PCB is designed in 3 layers. You can see both the 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 on this site in all articles are clickable, so you can easily download them at any time.
JLCPCB company delivered this package box via DHL shipment where I received 5 nos of PCB for just $2 and received it within a week’s time.
Now it’s time to assemble the components on a printed circuit board (PCB). This is an essential step for anyone creating their own circuits and devices, as it allows you to combine the various electrical and electronic components in the desired manner. You’ll need to use a soldering iron, solder, and flux, plus some other tools such as wire cutters and cable strippers. It can be a tricky process but with practice, you can successfully build up your circuit boards and make sure that all of the components are in place. As you carefully join everything together and test out your board, don’t forget to double-check each connection and keep an eye on all of those tiny pins!
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.
At 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
This amplifier is outfitted with only the finest components. There’s no settling for anything less here- only high-quality products make it into this setup! From the power transistors that amplify the signal to the big speakers that deliver it, each element of this rig is carefully chosen and tailored to guarantee maximum performance. The result of this careful curation? Superior sound quality and stunning clarity – no matter what type of music you’re playing!
- 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 the Gerber file here
Making a DIY homemade stereo amplifier on PCB is a great way to listen to your favorite tunes with the professional-level sound quality from the comfort of your own home. It’s relatively easy and relatively cheap compared to commercial options, and the satisfaction you’ll get from building it yourself makes it all worthwhile. The end result is a highly configurable device that can be adapted for different circumstances, either with additional features or simply an upscaled model with more power. And the best part is that you can have full control over the frequency shaping and sound of your amplifier, truly making it your own!