Onkyo ED-PH0N3S Maiden Audio Headphones Balanced for clean highs and lows but also for the all important space in the mid-range to best display the dynamics and complexities of rock and metal music 40mm drivers made of Titanium- One of the strongest, lightest metals on earth gives an Ultra clean and highly accurate sound High performance cables of multi-strand conductors shielded with a Fabric cover to further protect the signal Developed by Steve Harris, founder & co-producer of iron maiden, and Onkyo engineers. New 40 mm (1 9/16 Inch) Wide-Range Titanium Coated Diaphragm 232 days of development, 22 Onkyo engineers, 60 drive unit trials, 34 sleepless nights, 14 cable set-ups, 5 re-workings, 1 Steve Harris