The MV1 Professional Studio Stereophone This new addition to our stereophone line clearly reflects our commitment to the professional recording and broadcast industry. Whether you’re a recording artist, a professional DJ or the ultimate audiophile, the Koss MV1 delivers unmatched performance you won't want to miss. The MV1 stereophone features titanium coating on a 2 mil. high-polymer diaphragm for a frequency response of 10-25,000 Hz. A one-inch diameter oxygen-free copper voice coil improves signal transmission and conduction for an accurate and precise sound reproduction. Computer optimized ferrite magnet structures provide deep bass and treble clarity. Closed cushions seal tightly around the ear