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Passive 1870's sound amplificator

3D model description

Horn amplificator for your IPhone 4/4s

based on the ducts found on good old gramophones!

Amplifies the sound pressure from 70dB to 85dB ;)

3D printing settings

I have printed both parts on my ultimaker using netfabb

  • 3D model format: STL

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License

CC BY SA

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