A passive phone amplifier will make your phone audio louder, but some look like trash. Build this wooden one so your setup both sounds and looks good.

This diagram shows the standard layout of transistors in cell phone power amplifiers, at left, and a new highly efficient amplifier design, at right. The new design could help make possible ...

Currently being funded on Kickstarter, Trobla is a wooden amplifier for your mobile phone speaker.If you have ever tried playing music from your phone in a glass cup at a party to boost the sound ...