beyerdynamic DT 880 Premium Edition 250 Ohm Over-Ear-Stereo Headphones. Semi-open design, wired, high-end, for the stereo system Connectivity Technology: Wired High-end semi-open headphones with true sound definition and phenomenal bass response Reproduces immersive three-dimensional acoustics with 5 Hz to 35 kHz frequency response Combines best of open and closed technologies to reproduce complete sound spectrum Single-sided cable, replaceable soft ear pads, and padded headband for comfort 1/8-Inch gold-plated stereo mini jack and 1/4-inch adapter