Sennheiser's over-ear HD 650 headphones offer optimum stereo sound for your home entertainment. Discover all its features now! Features: Open-back dynamic headphones, Special damping element made from fine acoustic metal mesh, Exclusive 42 mm transducer and 38 mm diaphragm, Lightweight, timeless design and comfortable velour pads for hours of fatigue-free listening, Frequency response: 12 – 41,000 Hz. Go-to reference for analytical listening, Extremely tight production tolerances (± 1 dB) and handpicked components, Detachable connecting cable made from highly conductive OFC copper, Impedance: 300 ohms, Total harmonic distortion: <0.05%. Sennheiser HD 650. Product type: Headphones. Connectivity technology: Wired. Recommended usage: Music. Headphone frequency: 10 - 41000 Hz. Cable length: 3 m. Weight: 260 g. Product colour: Black Grey