beyerdynamic DTX 900 Trendline Headphones (Discontinued by Manufacturer) Open-style headphones that deliver well-balanced performance and spacious sound stage High-quality DTX speaker drivers with 40mm Mylar diaphragms and neodymium magnets Double-hinged ear cups with comfortable cushions that adjust to the shape of the wearer's head 10 Hz to 22 kHz frequency response with 32-ohm impedance Single-sided 8-foot cable with 1/8-inch stereo mini jack and 1/4-inch adapter