Previously, it was a speaker in a lunch box, what could be a better simple thing to put my projects in, right?
Well, I didn't feel like bothering with making a wooden box, so I just dismantled a speaker from my workshop and modified it to my liking.

I also replaced the speaker (Philips 5W 4ohm) because I thought it was playing too quietly,
so I dug out this Soviet relic that I had taken out of my first receiver a long time ago.
When I photographed the label and searched it, it showed that it has an incredible power of 1W and an impedance of 4ohms, it was made in the year of 1979 and the brand that made it was called Radiotehnika.(Absolutely useless information: Radiotechnika is also a name of a post-punk band.)

The amplifier needs the voltage of 20V so I added a step-up converter and a simple filter, so now it runs on 5V, and my pretty crappy power supply shows a current consumption of 500mA.
I know absolutely nothing about filters, so I went with my assumptions: coils smooth out the current, and capacitors smooth out the voltage.


Another thing I'm going to do is make a brass cover for the front to protect the speaker,
and make side handles, because I'm planning to use it as part of a reception set, so I can attach it to my radio bag. (that's why the brass cover)