DT 770 PRO, 250 Ohm Reference headphone for control and monitoring applications, closed Features ▲ Closed, diffuse-field studio headphone ▲ "Bass reflex" technology for improved bass response ▲ Comfortable fit due to rugged, adjustable, soft padded headband construction ▲ Robust, easy serviceable construction as all parts are replaceable ▲ Single-sided cable ▲ Velour, circumaural ear pads Technical Specifications Transducer type Dynamic Operating principle Closed Weight without cable 270 g Frequency response 5 - 35,000 Hz Nominal impedance acc. to IEC 60268-7 80 Ω Nominal SPL acc. to IEC 60268-7 96 dB Nominal THD acc. to IEC 60268-7 < 0.2% Power handling capacity acc. to IEC 60268-7 100 mW Sound coupling to the ear Circumaural Ambient noise isolation approx. 18 dB (A) Connection Gold plated stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm) Length and type of cable 3 m / straight cable Nominal headband pressure approx. 3.5 N