I made this ammo can bluetooth speaker, it sounds really good and it is very loud as well. For all the parts and the instructions on how to make it see the next steps.

Step 1: Parts List

The parts you will need:

Optional:

- DC input https://nl.aliexpress.com/item/3A-12v-for-DC-Power...
- 3.5mm input https://nl.aliexpress.com/item/10PCS-Lot-PJ392-3-5...
- Step Down module https://nl.aliexpress.com/item/DC-DC-Buck-Converte...

When external bluetooth module:

- Ground loop isolator https://nl.aliexpress.com/item/1PC-High-Quality-3-...
- Bluetooth module https://nl.aliexpress.com/item/Ugreen-Wireless-Car...

3D Printed speaker grills:

- 3D printer
- PLA Fillament
- Spraypaint
- STL file (In the description, file is for 13 cm speakers specifically)

Tools:

- Soldering Iron
- Jig Saw + Steel cutting blade
- Cordless drill + Steel drill bits
- Steel file (different shapes)
- Hot Glue Gun
- Locktide

Step 2: Build Progress

- Mask the entire ammo can in masking tape to prevent scratches.
- Drill/cut the desired holes.
- Put all the electronics in the holes.
- Use some type of glue or locktide to secure the speaker nuts and bolts, this will prevent the nuts from comming loose because of vibrations.
- Wire all the electronics with the help of the schematic in the previous step.
- Plug in the 3S lipo
- Flick the switch
- Have fun!