This new addition to our stereophone line clearly reflects our commitment to the professional recording and broadcast industry whether yoursquore a recording artist a professional dj or the ultimate audiophile the koss mv1 delivers unmatched performance you won39t 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 conduct