With titanium-coated elements, the KSC55 delivers high quality sound performance to active and fashion-conscious listeners who never miss a beat and always arrive in style. The KSC55's behind-the-head design won't mess with hairstyles or get in the way of headgear like bike helmets or baseball caps. The KSC55 features dynamic elements for a wide frequency response from 15-25,000 Hz. A 2 mil. titanium coating on its mylar diaphragms increases the rigidity of the elements*, minimizing mechanical distortion and ensuring exceedingly accurate sound reproduction. Computer-optimized neodymium iron boron rare earth magnet structures mean the KSC55 delivers excellent volume, even with low-voltage MP3 and disc players. Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. Minimize