The AKG K 66 Dynamic Headphones stand out from the "good value" crowd. The K 66 combines excellent comfort with superior sound. Features a self-adjusting headband, soft leatherette ear pads, and lightweight, flexibly suspended earphones that are semi-open to give you an airy sound. Large, high-performance 40mm transducers ensure superior sound quality and listening enjoyment. The AKG K 66 Dynamic Headphones offer frequency response of 18Hz to 22kHz.