Check out this DIY portable mini amplifier built by Chu Moy which is also known as CMoy Pocket Amplifier. It can be fit in a lozenge tin and into your pocket. It is powerful enough to drive your weak sources sound to thunderous volumes. Since it's so powerful, will it burn or blow up in your pocket? Who knows, technical failure may lead to unwanted things to happen. Chu Moy was able to pack everything in the CMoy Pocket Amplifier for just USD20 and a better one with the price of USD50. According to Chu Moy, you won't need to understand how the am or its components works, but you will have to be able to follow some pretty exact directions. I plan to try it out one day.

[via hack247]