DIY CARDBOARD SPEAKER FOR PHONE - DOES IT WORK?

Through this video clip i show that how to make a cool & very cheap diy smartphone amplifier/speaker. By using this craft amplifier you can boost the volume of your mobile phone and this is one of the best and useful smartphone accessories for everyone. DIY CARDBOARD SPEAKER FOR PHONE - DOES IT WORK? __________________________________________________________ #paperspeaker #speaker #diyspeaker #cardboard