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Sick of the crappy small sound coming from your crappy small iphone speaker? AMPLIFY IT with a bull-horn style DIY amplifier! This simple gadget will definitely increase the volume by 10%-25% depending on the material you use and the shape and size of the 'horn'. (ALL MUSIC by MNC PRODUCTIONS)
nice! I will try to use different materials like foil paper!!!
Cut a slot into the bottom of a paper cup, insert the speaker end of your phone. Voila!

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