Thursday, 24 September 2015

Folded horn passive phone speaker

There's something very attractive about a piece of equipment that needs no electrical power, and the passive phone speaker fits into that category. And of course the challenge for the DIY'er is to build one him/herself.I decided to build one loosely based on the folded horn principle, after building...
By: mxx

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from Instructables: exploring - technology - robots


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