iPhone 6 trombone bell amplifier - Bach 42/50, customizable

Want to let others hear a song after rehearsal and can't because that tiny phone speaker just isn't loud enough? Put this little part in your trombone case. Then surprise everyone by connecting your iPhone 6 to your trombone bell and it will be really loud!

Picture shows it attached to a Bach 42B and a PrintBone bell. It fits a regular brass Bach 42 or Bach 50 bell, or any trombone with the same connector (Yamaha 622, probably some Edwards models and more), including the PrintBone.

Have another kind of phone or trombone bell? Press the customizer button and easily adapt it to your own equipment.

Of course, a trombone bell is not made for a linear frequency response, so it will sound a bit like those early gramophone-players with a horn.

If you want it with a PrintBone bell: http://www.thingiverse.com/thing:1845509

I printed it on the fastest setting available to my printer, without support or brim. Use whatever infill you like, 10-20% should be fine. Perimeters might have an effect on airtightness which will have an effect on acoustics, but with 2 perimeters it worked well. Might even be better with slight leaks.