I speaker box for a tiny, portable speaker.

Here is a video where I demo talk about the design and a quick demo: https://www.youtube.com/watch?v=5IMl47iG-28

Instructable here: https://www.instructables.com/id/3D-Printed-Mini-Bluetooth-Speaker/

Dimensions: Length: 110mm Width: 50mm Height: 39mm Speaker hold diameter: 37mm

You can easily make this a Bluetooth speaker with this handy device (~$3): https://www.aliexpress.com/item/3-5MM-Jack-Bluetooth-AUX-Audio-Music-Receiver-Car-Kit-Wireless-Speaker-Headphone-Adapter-Hands-Free/32782962579.html

You can get components from AliExpress:

Speakers: https://www.aliexpress.com/item/2pcs-40mm-4ohm-3W-Full-Range-Speaker-for-Mini-Stereo-Loudspeaker-Box-Diy-Accessories/32715542233.html

3.5mm Jack: https://www.aliexpress.com/item/20Pcs-3-5mm-Female-Audio-Connector-3-Pin-DIP-Headphone-Jack-Socket-PJ-301M/32704147531.html

TP4056: https://www.aliexpress.com/item/1PCS-5V-1A-Micro-USB-18650-Lithium-Battery-Charging-Board-Charger-Module-Protection-Dual-Functions/32467578996.html

PAM8403: https://www.aliexpress.com/item/10PCS-PAM8403-Super-mini-digital-amplifier-board-2-3W-Class-D-digital-amplifier-board-efficient-2/1084746279.html