Denon is the company that invented digital recording over thirty years ago. They have led the audio world with leading edge technologies in audio and video sound reproduction. Now you they have taken that same attention to detail and put it into the design of an incredible series of headphones. The Denon AHD1001K On-Ear Headphones are designed to reproduce all of the nuances of the digital music you listen to. The microfiber diaphragm with acoustic optimizer provides superior sound quality from 8 to 37,000 Hz. High-quality, oxygen-free copper cabling ensures only the cleanest sound. This headphone also features an attached 5-foot cable and 11.5-foot extension cable.