Fostex TH-900, reference headphones, driver unit with1.5 tesla (15,000 gauss) magnetic circuit and bio-dynamic 50mm diaphragm, Japanese Cherry Birch (Betula Grossa) housings with traditional "Urushi" lacquer and selected 7N OFC cable. All coming together to achieve the sonic goal of a wider stereo field, high resolution and transparent reproduction. Specifications: Type: Dynamic, Driver: 50mm dia Nd magnet, Impedance: 25 Ohms, Sensitivity: 100dB / mW, Maximum Input: 1,800 mW, Reproduction Frequency: 5 - 45k Hz, Weight: 400g (excluding the cord), Cord: 3m Y type 7N-OFC, Plug: 6.3mm dia gold coating stereo phone plug, Accessory: Headphone stand