Detachable in-line volume control Voiced to remain true to the character of KRK’s class leading studio monitors, developed with 25 years of years of experience in studio sound. The latest reference quality frequency response for closed-back, circum-aural dynamic headphones. Newly developed headphone acoustical system bringing a new level of headphone performance for the first time. Utilizing the latest in acoustic memory foam technology this ensures class leading performance in both reproduction and isolation. Incredibly natural frequency response. KRK has always been focused solely on accurate monitoring. The KNS 8400 - with their ability to reveal exactly what you have on the tracks is an ideal choice for critical listening. Being able to discern the most subtle differences in pitch, timbre and tone helps you to get it right every mix, every take, every performance. Isolating memory foam in the ear cushions delivers improved low end response and because they gently conform to your unique head shape you'll be comfortable wearing them all day. KRK headphones provide a precise listening experience that takes you from personal studio to commercial studio to on-the-go track evaluations - and they allow you to accurately enjoy your music with the consistent voicing philosophy and honest reproduction top producers, studio musicians, performers and engineers have come to trust. The KNS 8400 offer an incredibly natural frequency response that gives you a reference standard unaffected by your location. Day or night. Studio or home. Without disturbing others. Without compromising your tracks.