Mk2 Specifications:
Type: Closed-back Dynamic (circumaural isolation design)
Driver Diameter: 53mm
Magnet: Neodymium
Frequency Response: 5 – 33,000Hz
Maximum Input Power: 3,500mW
Sensitivity: 105dB/mW at 1kHz

Impedance: 36 ohms
Weight: 350g
Cable Length: 1.2m (Coiled)/Max 3.0m

Both MK1 & Mk2 versions of Xone XD-53 headphones are now discontinued. However, spares for the MK2 version may still be obtained through your local Allen&Heath distributor.