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Home Brewed iPhone Amp

We definitely “have a thing” for electricity-free iPhone amps, and this lo-fi solution is made of PVC and an old bike horn! This is the absolute bees knees.

Upcycle That!

But wait, there’s more! →

To make, get an old bike horn and remove the noise maker. Screw the horn into a piece of PVC aligned with the iPhone speaker. Be sure to learn the ends of the PVC open for more expansive sound. Now press play.

[original]Source: lowtechatmo