The Behringer BH40 Circum-Aural Headphones are designed for studio reference purposes with a closed-back noise-isolating design suited for musicians producers and more. With a wide 10 Hz - 35 kHz frequency response you get a consistent low-end and sparkling highs - all delivered with the Neodymium 40 mm drivers. Plus the BH40s closed-back design provides a consistent listening environment while the cushioned earpads and adjustable headband provide long-lasting comfort.