Adafruit Speaker Case

Case designed for Adafruit's 3" speakers.

Example here: https://www.adafruit.com/products/1314

Holes are designed for M3x10mm screws. The holes are designed for 2.5mm so they can be tapped, but usually printers will have them coming in a bit small depending on nozzle size. Drill out the holes in the base (if necessary) to 2.5mm and tap with M3 tap. Lid will clamp the speaker in place.