The DT 770 PRO is a closed dynamic headphone of exceptional quality suitable for the most demanding professional and audiophile applications. The long term comfort and accurate performance make the DT 770 PRO the perfect monitoring headphone for recording studios, post production or broadcasting situations. The low mass coil and diaphragm assembly produce a transient performance equalled only by electrostatic earphones, and, in combination with a carefully tailored frequency response offer a natural and balanced sound. Soft earpads and adjustable, sliding, earpieces together with a single sided connecting cable ensure listening comfort during extended periods of use. The DT 770 PRO features 80 ohm drivers and a gold plated 3.5 mm stereo jack with 1/4" inch adapter, and is therefore suitable for use with almost all headphone amplifiers. Features • Closed diffuse field studio headphone • Innovative bass reflex system • Robust spring steel headband • Single sided cable • Soft inner headband • Gold plated jack plug (3.5 mm) and adapter (6.35 mm) Versions DT 770 PRO 250 Ohm: Order # 459.046 (250 O) DT 770 PRO 80 Ohm: Order # 474.746 (80 O) DT 770 PRO 32 Ohm: Order # 483.664 (32 O) DT 770 PRO LTD 80 Ohm 88dB: Order # 705.969 (80 O) DT 770 PRO LTD 80 Ohm 93dB: Order # 705.977 (80 O) DT 770 PRO LTD 80 Ohm 99dB: Order # 497.215 (80 O) DT 770 PRO LTD 250 Ohm 88dB: Order # 705.985 (250 O) DT 770 PRO LTD 250 Ohm 89dB: Order # 705.993 (250 O) DT 770 PRO LTD 250 Ohm 93dB: Order # 705.934 (250 O) DT 770 PRO LTD 250 Ohm 99dB: Order # 497.231 (250 O) Transducer type: Dynamic Operating principle: Closed Nominal frequency response: 5-35,000Hz Nominal impedance: 32O/80O/250O Nominal SPL: 96dB SPL Nominal T.H.D.: <0.2% Power handling capacity: 100mW Sound coupling to ear: Circumaural Ambient noise isolation: 32 O version approx. 20 dBA 80 O / 250 O version. approx. 18 dBA Nominal headband pressure: approx. 3.5 N Weight (without cable): 270g Length and type of cable: 32 O version 1.6 m / straight cable 80 O version 3 m / straight cable 250 O version 3 m / coiled cable Connection: Gold plated stereo jack plug (3.5 mm) and 1/4" adapter (6.35 mm)