Tiny computer speakers basing on Visaton BF37

Hello,

Here are the computer speakers based on Visaton BF37 tiny transducers. My primary aim was to challenge the rules of physics and create as small speakers as possible delivering as much bass as possible :) And here is what I've achieved.

To calculate the size of the cabinet I've used WinISD (free software for speaker cabinet calculations) feeded by the set of Thielle-Small parameters provided by Visaton. The ideal volume is 0.38 L while the length of the bass-reflex pipe is 10 cm for its internal diameter of 12 mm.

Here you can listen to them:
https://www.youtube.com/watch?v=MFXrRalvIiA

Besides 3D printed cabinets and speakers I've used:
- 21 x M2.5 screws,
- 2 x audio cable with jack plugs on one side. Could be a jack-jack cable split into 2 halves.
- 1 x tiny 3W 5V D-class stereo amplifier,
- 1 x jack socket (to be able to detach the passive speaker).
- 1 x the TP4056 li-ion charger module, where I just use the micro-USB socket. You can use the rest of th