Bluetooth bass-reflex speaker

This started as a remix from https://www.thingiverse.com/thing:4668173

Edit 2021/02/15:
Check out version 2. It prints much easier and sounds just as good: https://www.thingiverse.com/thing:4768470
I added STEP files.
There is also an STL for a redesigned front panel. This one can be used in case you want to screw the speaker to the outside of the cabinet.

Edit 2021/02/01:
This tiny speaker is quite amazing with an amp that can boost the bass! The bass-reflex design works very well.

Here is my 6 liter subwoofer for an awesome 2.1 system: https://www.thingiverse.com/thing:4838080

I added some photos of the speaker. Please bear in mind that I use this one for engineering and testing, not for cool looks. With a little more effort you can make it considerably more pleasing to the eye :)

Original description:
The original back horn speaker design by guppyk is very good looking but the sound was quite a letdown. The horn amplifies the mids as well and the reflective surfa