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How to amplify your phone's sound with a stethoscope & bottles | Easy DIY speaker hack!
Discover a creative way to amplify your smartphone's sound with this easy DIY project. Learn how to repurpose a stethoscope and plastic bottles to build a homemade phone speaker amplifier. Follow step ...
Reber Stein set out to learn how to play guitar, but instead discovered how to make amplifiers. More than a decade ago, Stein bought a guitar and an amp in an effort to learn how to play. When ...
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