Super Cheap Acoustically Amplifier (horn Type) for IPhone/iPod Touch

I think is so simple it doesn't need any explanation...
Enjoy 5 decibels more for free!
X
Gustabofrog

PS: I call it iRoll ©

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    gsheel

    7 years ago on Introduction

    What an amazing instructable! I did something similar by cutting holes in 2 plastic cups and mounting them on both sides of a Nokia n810 :)