trumpet-cell-phone-amplifie

Hipsters Machine: AnalogTelePhonographer

Uploader’s comment:
The Analog Tele-Phonographer (Version 1) is a sound amplifier for my cell phone / portable music player.

I made it from a broken trumpet and a fistful of scrap metal. The unit uses no external power or batteries, has no moving parts, and is entirely self-contained.

For photos, other versions, and more information, here

source: Reddit

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