High Definition made in Germany. The open designed DT 990, one of the classics from beyerdynamic that have set the standard for reference headphones. The superior craftsmanship captures the dynamism and excitement of the audio signal like no other. Three dimensional acoustics and an unrivalled level of wearing comfort to satisfy the most discerning audiophile - high end made in Germany! The beyerdynamic Consumer headphones range includes superior high end headphones for discerning HiFi enthusiasts at home. The DT 990 with its lamella optics will be an eye-catcher for fans of sophisticated designs. This high end product represents beyerdynamic's tradition to combine superior audio quality with state-of-the-art material and perfect workmanship. The distinctive headband features a high comfort and the modular construction allows replacement of all serviceable parts including the ear pads. Impedance is 250 ohm. The DT 990 includes a gold vaporised mini stereo jack plug (3.5 mm) and 1/4" adaptor (6.35 mm). The DT 990 is also supplied with a high-quality carrying case. All beyerdynamic headphones include a 2 year parts and labor warranty serviceable in the U.S.A. Frequency response- Dynamic , Nominal SPL - Open, Nominal impedance- 5 - 35,000 Hz, Nominal headband pressure- 96 dB , Weight without cable - 250 ohm, approx. 2.8 N, 9 oz.