After a lot of useless model on the internet I made this one with should be very printable.
I fitted the speaker inside the model with hot glue and drilled a hole in order to charge it when assembled.
Speaker: http://amzn.eu/8p0rs6v
Printer:
ANET A8
Rafts:
Doesn't Matter
Supports:
Doesn't Matter
Resolution:
0.2
Notes:
0% infill due the speaker. I put 1 mm in the wall thickness and the same for the upper and the ground side.
It feels very tough.