Fiio A1 is an impressive amp for your phone that costs only $28

[Windows Central]

Pump up the jam, just a little bit, with this pocket-size amplifier from Fiio.
While the Zune may be a thing of the past, with a smartphone in all of our pockets we all have music at our disposal wherever and whenever we want it. However, smartphones aren't dedicated music players and as such, they don't always have the hardware inside to really make the most of your tunes.
There are exceptions, and Sony and LG released recent Android phones that embrace audio. What can the rest of us do to enhance our aural experience? A set of good headphones is crucial, but what about an amplifier?

Full story from the WindowsCentral blog...