Horn Stand: By the far the most portable of the electric-free amplification systems, the Horn Stand provides lo-fi amplification that can increase your phone's sound up to 13 decibels. And since this nifty little gadget doubles as a stand, just set your iPhone down on the counter and you can have instant music wherever you go.
iPhone Megaphone: This power free device uses a simple and elegant design to create a great looking iPhone amplifier. While not as portable as our other power free amps, this piece certainly makes up for it with great looks. Check out en&is's site for more details on the availability of this beautiful amp. Wooden Speaker System: This portable speaker dock is made entirley from wood and resembles many draditional speaker docks in terms of look. What sets it apart, however, is that it has no electronics, and uses basic acoustic principles to magnify the sound through its wooden chambers. If you are looking for a portable and electric free solutions, the Koostic doc is for you.