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We’ve seen papercraft passive amplifiers before, but the Whirlwind from instructables member urant folds away flat so you can stick it into your pocket. [via Life Hacker]

Adam Flaherty

Adam Flaherty

I make cool stuff and write about other people making cool stuff on If you have something you think I should see, send me a tip.

  • mikayla

    i could use this. it is a pretty smart idea by the way sound travels.

  • papercraftsquare

    cool! can i repost this model at