There are a lot of passive iPhone speaker systems out there that improve your phone’s sound system without the need for fancy electronics. However, the iCarry Bike iPhone Amplifier seems to be the first one that is designed for the sole purpose of mounting onto the handlebars of your bike.
German-based company OKAZI provides you with a mounting arm that will keep your iPhone within reach when on the road, and a case to make sure it�s protected. The bottom of the case has two funnels that are reminiscent of a conch shell that will amplify whatever sound is coming out of your speakers. This only costs about $50, but in my opinion would be money better spent on some quality headphones. Cars who blare music are always annoying, and there�s a good chance that anyone blaring music on a bicycle is not going to get a different response.