This is a wall mountable passive speaker designed around an iPhone 8 in a case.

The opening for the phone is 78 mm x 14 mm. It will also accommodate similarly sized phones such as a Pixel 2, though the fit is less exact. It features a dual horn system, one for higher frequencies, another for lower. There is also a cutout for phones that don't have a bottom firing speaker.

I printed with no supports, 18% fill.

There is nothing to do post-print, it's ready to go.

NOTE: This is a big print. Uses about 1/3 a kilogram, so make sure you have plenty of filament and are willing to spend the money/plastic on it.

I don't recommend printing in any other orientation. I rotated mine 45 degrees to avoid vertical artifacts. It should print fine as is. No supports, it's hollow inside with some walls and horn components. I ran cooling at 100%.