Transducer type dynamic Operating principle semi-open Frequency response 5Hz - 35kHz Nominal impedance 250 ? per system Nominal sound pressure level at 1 kHz 96 dB Sound coupling to the ear circumaural Weight without cable 295g 3 m coiled cable Connection gold-plated mini stereo jack 3.5 mm and 6.35 mm adapter (1/4") Specifications Semi-open, diffuse-field studio headphone with single-sided cable Comfortable fit due to rugged, adjustable, padded headband construction, and soft velour ear pads Strong construction with replaceable parts Single-sided cable, 250 ohms, 96 dB nominal sound pressure level Includes nylon carrying case, gold-plated stereo jack plug and ¼" adapter Semi-open, diffuse-field studio headphone with single-sided cable Comfortable fit due to rugged, adjustable, padded headband construction, and soft velour ear pads Strong construction with replaceable parts Single-sided cable, 250 ohms, 96 dB nominal sound pressure level Includes nylon carrying case, gold-plated stereo jack plug and 1/4-Inch adapter