This is an enclosure specifically built for the Speaker Select V3 project (https://github.com/nebhead/spkr-select-v3).

The base can be printed with minimal supports perhaps only in the middle sections of the rear openings. I would recommend not to put supports on the front panel button holes or any of the circular holes.

The top & blank panels can be printed without supports.

The round power block may need some supports depending on the orientation you print in.

This design was done in OnShape and can be cloned for your purposes: Link to OnShape

Documentation on this project can be found here: https://nebhead.github.io/spkr-select-v3