Building the simplest, best sounding, yet most inefficient Audio Amp! || Class A Audio Amp Tutorial

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Transistor (BJT) as a Switch video: https://youtu.be/WRm2oUw4owE
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More project information (schematic,.....) on Instructables: https://www.instructables.com/Building-the-Simplest-Best-Sounding-Yet-Most-Ineff/

Parts list (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

Useful sites which were partly shown in the video:
https://www.electronics-lab.com/article/class-a-amplifiers/
https://learnabout-electronics.org/Amplifiers/amplifiers21.php
https://learnabout-electronics.org/Amplifiers/amplifiers20.php
https://www.tutorialspoint.com/amplifiers/class_a_power_amplifiers.htm
https://www.electronics-tutorials.ws/amplifier/amplifier-classes.html
https://www.electronics-tutorials.ws/amplifier/amp_5.html

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!

Thanks to JLCPCB for sponsoring this video.
Visit https://jlcpcb.com to get professional PCBs for low prices.

Music:
2011 Lookalike by Bartlebeats

0:00 Why I want to build a class A audio amp
1:02 Intro
1:39 General circuit design
3:03 Closer look at the Base Input side
4:24 Comparison of class A, B & AB amplifiers
5:30 Closer look at the Collector Output side
6:23 Selecting the complementary components
8:34 Extra Information about class A amps
9:05 Modifying a USB Type-C board to get 5V
9:53 Practical build & End