Labyrinth Horn Speaker

A popular "Bluetooth back horn speaker" inspired remake.

#Improvements
I did some improvements from the original one.

**Speakers**
* **Tweeter**. You can't achieve good sound from the one loudspeaker, even if it broadband. Just split it into two bands, lower for the woofer and higher for the tweeter.
* **Passive radiator**, which increases your woofer efficiency and helps it to play the very low frequencies.

**Electronics**
* **Touch buttons** to control the volume.
* **Connectors plate** on the backplate for the power plug, audio connectors, and so on.

**Mechanics**
* **M8 rod tunnel** at the bottom to increase weight and stability.
* **Labyrinth's walls** can be not so thick as in the original. Better to make it thinner and more soft/viscous inside to prevent a ringing.
* **Woofer mount** has been ruggedized to ensure it is mounted reliably and will not break under its weight.

**Sound design**
* **Fillets** added to every corner.
* **No parallel walls** to pr