Sennheiser HD 650 Headphones Default Title The best open, dynamic headphones are Sennheiser HD 650 Headphones. The HD 650s, which were created from the highly regarded HD 600, have upgraded materials for even greater sound reproduction. They hold the listener's attention with their passion and emotion while upholding perfect accuracy and lifelike replication. Enjoy flawless sound! Features Systems with narrow tolerances (± 1 dB), hand-picked in pairs Highly optimised magnet systems for minimum harmonic and intermodulation distortion High-quality titanium/silver finish A specially developed damping element, made from fine acoustic metal mesh, ensures a precise damping over the entire diaphragm surface, highly constant in all climates. Specially modulated connecting cable (detachable) made from highly conductive OFC copper, Kevlar-reinforced, with very low handling noise, i.e. low structure-borne sound sensitivity Extremely lightweight aluminium voice coils ensure excellent transient response Gold plated 1/4" jack plug with adaptor lead to 3.5 mm jack plug 2-year warranty Tech spec Wearing style Headband Color titan Frequency response (headphones) 10 - 39500 Hz Sound pressure level (SPL) 103 dB THD, total harmonic distortion < 0,05 % Contact pressure ca. 2,5 N Ear coupling circumaural Jack plug Jack 6,35 mm stéréo plaqué or Cable length 3 m / symétrique /détachable Transducer principle dynamic, open Weight w/o cable: 260 g Nominal impedance 300 Ω