Bicycling around town wearing earbuds isn't a great idea and is even illegal in some places. But a set of decent bicycle-mounted speakers will set you back $60-$120, and if you crank them up you risk some dirty looks. Now there's a third alternative. A Taiwanese company figures that if you're going to spring for a handlebar mount for your iPhone, you should get a little sound amplification in the bargain.
Horn Bike from Fruitshop (I'm guessing the names sound a lot cooler to Taiwanese ears) features a small horn that passively amplifies the sound from your iPhone's built-in speaker. Think cutting-edge technology circa 1890.
The silicone iPhone 4 mount doubles your phone's volume, making it loud enough to hear well--given not a whole lot of ambient noise. Because the horn projects the sound right at you, it's not so loud that it bothers people sharing the road or trail.
The $30 mount-cum-speaker is a descendent of Fruitshop's iPhone stand with horn. I like the passive acoustics and the price is right, but I don't know that the Horn Bike will win anyone over based on sound quality. See the video below.
(Via Wired News)