beyerdynamic Studio Headphones, Gray, 250 OHM Pro (490970) Beyerdynamic DT 880 Pro Professional Studio Headphones. Semi-open, diffuse-field studio headphone. Analytical sound. Comfortable fit due to rugged, adjustable, soft padded headband construction. Robust, easy serviceable construction as all parts are replaceable. Single-sided cable. Velour, circum-aural (around the ear) ear pads. Supplied in a nylon carrying case. Transmission type Wired. Headphone design (operating principle) Semi-open. Headphone design (operating principle) Semi-open. Headphone impedance 250 ohms. Headphone frequency response 5 - 35.000 Hz. Nominal sound pressure level 96 dB. Cable & plug Coiled connecting cable with mini-jack plug (3.5 mm) &  adapter (6.35 mm). Net weight without packaging 295 g.