The DT 990 PRO is an open dynamic headphone of exceptional quality suitable for the most demanding professional and audiophile applications. The reduced weight of the diaphragm and moving coil result in a similar pulse characteristic as electrostatic headphones, and in combination with a carefully tailored frequency response offer a natural and balanced sound. Soft ear pads and adjustable, sliding, earpieces together with a very flexible coiled cable ensure listening comfort during extended periodsofuse. Features • Open diffuse field studio headphone • Robust spring steel headband • Single sided cable • Soft inner headband • Gold plated stereo jack plug (3.5 mm) & 1/4" adapter (6.35 mm) Transducer type: Dynamic Operating principle: Open Nominal frequency response: 5-35,000Hz Nominal impedance: 250O per cartridge Nominal SPL: 96dB SPL Nominal T.H.D.: <0.2% Power handling capacity: 100mW Sound coupling to ear: Circumaural Nominal headband pressure: approx. 3.5 N Weight (without cable): 250g Length and type of cable: 3 m / coiled cable Connection: Gold plated stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm)