The K92’s generous 40mm drivers deliver the highest sensitivity and widest frequency response of the K52 and K72 - resulting in powerful output that reveals every detail. The K92s also feature a low-impedance design for compatibility with a broad range of playback devices, from professional studio gear to portable music players. The K92 headphones’ closed-back design eliminates audio leakage and delivers sound to your ears only. The mic won’t pick up the sound of the click track in your headphones - and you’ll always be able to mix and master peacefully without being distracted by outside noise. Features Professional 40mm Drivers - For reference monitor accuracy over a precisely balanced 16Hz–22kHz frequency response Lightweight Design and Self-Adjusting Headband - For exceptional comfort over long periods of time Professional Build Quality - Gold Hardware, metal construction and closed back design for excellent durability and sound isolation Flexibility - Low impedence design and included gold adapter