Free Delivery. The new i K501 now certifiably works with iPhone, TM along with iPhone 3G & all 4th-generation or newer iPod media players. Another feature is composite video output, allowing the user to play video from the unit to larger screens. Still portable & still loud, the i K501 i KICKTM still features the outrageous, square-shaped reflex subwoofer on the back of the unit, along with a pair of five-inch woofers & silk-dome tweeters.