Smartphone passive amplifier
thingiverse
Fits nearly all big screen smartphones. I used an iPhone 7 Plus with a leather case. Amplifies quite nice. Printet in Wood is an eyecatcher too. It prints with less infill but then the sound lacks quality. Print it with the speaker opening facing upwards for best results. I used supports. You can remove them easy with in pincette through the phone opening. Have fun with it.
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