Professional drivers - clear sound in the studio and beyond Our K92 headphones deliver authoritative, extended low-frequency response that gives definition to kick drums and bass guitars. At the same time, the detailed yet precisely balanced high-frequency response reveals the nuance in vocals, guitars and acoustic instruments. 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.