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How to create a Hi Def Speaker for under a buck

post #1 of 3
Thread Starter 
I heard there was a video somewhere that demonstrates how to make a speaker out of foil and a coin but I can't find it. Can anyone help?
post #2 of 3
Thread Starter 
http://science.tv/watch/d5d21a44b0e5...r-under-a-buck.
post #3 of 3
has anyone trieid this?? looks kind of fun...
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