The New Pro4AAAT follows in a long line of Koss stereophones designed for the broadcast professional. The latest titanium version features a Sound of Koss that every discriminating listener is sure to enjoy. Computer optimized ferrite magnet structures provide deep bass and treble clarity. Closed, vinyl Pneumalite ear cushions seal tightly around the ear for improved isolation and maximum bass. Designed for ultimate durability for home or everyday studio use, the PRO4AAAT stereophone incorporates an extra-wide, adjustable steel and rubber headband design that further ensures comfort during long listening and recording sessions. The earcups also fold flat for convenient travel and storage.