The headline really says it all! The Bone Horn Stand is really an un-powered amplifier for the iPhone 4. This fancy device functioning just like those old-fashioned horn-speakers on gramophones. It’s a silicon case that slips over the iPhone’s bottom half, channeling the sound through the trumpet shaped tube, apparently adding 12 decibels of sound to your iPhone’s speakers.
The Bone Horn Speaker also works as a stand, supporting the iPhone in horizontal or vertical orientation, and even has a nubbin that will pass your presses on to the home-button beneath. Unfortunately, this amplifier match only on the iPhone 4.
Bone’s iPhone Unpowered Amplifier currently available in Green, Black or Bone color, and will set you back $24,95.