The HD 650 from Sennheiser are reference-class stereo headphones designed to deliver a true audiophile experience with an open, natural sound. Description In the HD 650, audiophiles will experience truly unique natural sound. With sound this good, long concerts in the comfort of your home are a certainty, so the HD 650 also sets standards in comfort and convenience. The HD 650 is a genuine masterpiece, which will satisfy even the most demanding listener. HD 650 – the Reference Class. Features Top-of-the-range open, dynamic hi-fi stereo headphones Systems with narrow tolerances (± 1 dB), hand-picked in pairs High-quality titanium/silver finish Specially developed acoustic silk for precise, uniform attenuation over the entire area Specially modulated connecting cable (detachable) made from highly conductive OFC copper, with very low handling noise, i.e. low structure-borne sound sensitivity Extremely lightweight aluminium voice coils ensure excellent transient response Exceptionally comfortable to wear due to elliptical design adapted to the shape of the ears Can be directly connected to stationary hi-fi components of the highest quality, in particular SACD, DVD-A and CD players Built-tough with a 2 YEAR warranty Specifications Wearing style HeadbandColor titanFrequency response (Headphones) 10 – 41000 HzTHD, total harmonic distortion < 0,05 %Contact pressure ca. 2,5 NJack plug Jack 6,35 mm stéréo plaqué orCable length 3 m / symétrique /détachableTransducer principle dynamic, openWeight w/o cable: 260 gNominal impedance 300 Ω