Building the Simplest, Best Sounding, Yet Most Inefficient Audio Amp!
by GreatScottLab in Circuits > Electronics
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Building the Simplest, Best Sounding, Yet Most Inefficient Audio Amp!
![thumbnail.jpg](/proxy/?url=https://content.instructables.com/FF8/3U06/KKML20RB/FF83U06KKML20RB.jpg&filename=thumbnail.jpg)
In this project I will be showing you how to create a class A audio amp. The great thing about such amps is that they only require a few components and sound awesome. On the other hand though, their efficiency is not that great. But since I will be creating this amp for a smartphone with a USB Type-C port for powering the amp, it should be just fine. So let me show you how to calculate a design for such an amp and how to build it! Let's get started!
Watch the Video!
![Building the simplest, best sounding, yet most inefficient Audio Amp! || Class A Audio Amp Tutorial](/proxy/?url=https://content.instructables.com/FU0/2VXX/KKML20WW/FU02VXXKKML20WW.jpg&filename=Building the simplest, best sounding, yet most inefficient Audio Amp! || Class A Audio Amp Tutorial)
The video gives you pretty much all the general information when it comes to building a class A audio amp. During the next steps though, I will present you some additional details.
Order Your Components!
![DSC03633.JPG](/proxy/?url=https://content.instructables.com/FAE/8JGY/KKML2046/FAE8JGYKKML2046.jpg&filename=DSC03633.JPG)
Here you can find a parts list with example seller (affiliate links):
2x BC337 NPN BJT: https://s.click.aliexpress.com/e/_9I1F1z
2x 100Ω, 2x 22Ω, 2x 3.3kΩ, 2x 1kΩ Resistor: https://s.click.aliexpress.com/e/_dTPpXjt
4x 10µF Capacitor: https://s.click.aliexpress.com/e/_d7dOwRz
1x USB Type-C breakout board: https://s.click.aliexpress.com/e/_AonKUJ
1x Audio jack: https://s.click.aliexpress.com/e/_9IfcXd
1x Audio plug: https://s.click.aliexpress.com/e/_ABC7UL
1x Perfboard: https://s.click.aliexpress.com/e/_A5V4B5
Build the Circuit!
![DSC03638.JPG](/proxy/?url=https://content.instructables.com/FRF/1QF7/KKML209B/FRF1QF7KKML209B.jpg&filename=DSC03638.JPG)
![DSC03640.JPG](/proxy/?url=https://content.instructables.com/FD5/2IEP/KKML20CK/FD52IEPKKML20CK.jpg&filename=DSC03640.JPG)
![DSC03649.JPG](/proxy/?url=https://content.instructables.com/FLV/YB4D/KKML20EI/FLVYB4DKKML20EI.jpg&filename=DSC03649.JPG)
![DSC03653.JPG](/proxy/?url=https://content.instructables.com/FX2/MM2U/KKML20GZ/FX2MM2UKKML20GZ.jpg&filename=DSC03653.JPG)
![DSC03660.JPG](/proxy/?url=https://content.instructables.com/FNI/LQ65/KKML20I7/FNILQ65KKML20I7.jpg&filename=DSC03660.JPG)
![DSC03663.JPG](/proxy/?url=https://content.instructables.com/FLB/H3AO/KKML20J9/FLBH3AOKKML20J9.jpg&filename=DSC03663.JPG)
Here you can find the schematic of the circuit along with reference pictures of my own board. Use it to solder up your own amp.
Downloads
3D Print the Enclosure!
![DSC03667.JPG](/proxy/?url=https://content.instructables.com/FGT/81CW/KKML20K3/FGT81CWKKML20K3.jpg&filename=DSC03667.JPG)
![DSC03680.JPG](/proxy/?url=https://content.instructables.com/FNG/TWKK/KKML20NP/FNGTWKKKKML20NP.jpg&filename=DSC03680.JPG)
![DSC03685.JPG](/proxy/?url=https://content.instructables.com/FCW/N9WR/KKML20OE/FCWN9WRKKML20OE.jpg&filename=DSC03685.JPG)
Here you can find the .stl files for my enclosure. Print it with your 3D printer and put your class A amp inside!
Success!
![DSC03691.JPG](/proxy/?url=https://content.instructables.com/FQ0/CWYV/KKML20PZ/FQ0CWYVKKML20PZ.jpg&filename=DSC03691.JPG)
You did it! You just created your own class A audio amp!
Feel free to check out my YouTube channel for more awesome projects:
http://www.youtube.com/user/greatscottlab
You can also follow me on Facebook and Twitter for news about upcoming projects and behind the scenes information:
https://twitter.com/GreatScottLab
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