Megaphone

thingiverse

This speaker system is built around an iPhone 8 that fits snugly inside a case. The opening for the phone measures 78 mm x 14 mm, and it will also work with phones like the Pixel 2, though they may not fit as perfectly. I printed this design without any supports and used a 20% fill setting. Once printed, there's no need to do anything - it's ready to use right away.