Koss P9

The Koss P9 are Behind-the-Head, side firing headphones designed for street-smart style and affordability.  The P9 is ultra-lightweight at about half an ounce and barely touches the ear, making them comfortable to wear for long periods of time.  The behind-the-head design does not interfere with hats or helmets, accomodates all head shapes and keeps the headphones in place even during rigorous activity making them ideal of active individuals.  Also, the side-firing design directs sound directly into the ear canal to give improved bass performance, but still allows outside noise to pass through keeping the user aware of his surroundings.  The P9 comes with a 4 foot long single entry cord with standard 3.5mm stereo jack.  There is also an included volume control on the cord which is very convenient when portable audio devices are stored in a bag, or out of easy reach.  The P9 has a frequency response of 40-20,000 Hz.