How to turn boring old airplane headphones into a powerful speaker with just tape and a cardboard box! Get a box! Get a box! Detach the speakers from an airplane, or any other pair of expendable headphones Create two paper cones Attach the cones by cutting a hole in the box and stickin...By: r2pen2
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from Instructables: exploring - technology - robots http://ift.tt/1vH8qPI
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