Sennheiser HD 600 Headphones The HD 600 Avantgarde are audiophile-quality, open dynamic hi-fi/professional stereo headphones. The advanced diaphragm design eliminates standing waves in the diaphragm material. The HD 600 can be connected directly to hi-fi systems of the highest quality, in particular DAT, DVD, MD and CD players. These headphones are an ideal choice for the professional recording engineer recording classical music. Features: - Sophisticated design, elegantly finished in black and grey - High-quality, open metal mesh earpiece covers for an extremely transparent sound - Computer-optimised magnet systems minimise harmonic and intermodulation distortion - Extremely lightweight aluminium voice coils ensure excellent transient response - Neodymium ferrous magnet systems for optimum sensitivity and a wide dynamic range - Exceptionally natural, spatial and accurate sound - Detachable OFC copper cable, with very low handling noise Specifications: - Frequency Response (headphones): 12 - 39000 Hz - Sound Pressure Level (SPL): 97 dB at 1 mW - THD, Total Harmonic Distortion: 0,1 percent - Contact Pressure: ca. 2,5 N - Ear Coupling: Circumaural - Jack Plug: 3,5/6,3 mm stereo - Cable Length: 3m - Transducer Principle: Dynamic, open - Nominal Impedance: 300 Ohms - Weight without Cable: 260g