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. Putting on the headphones and using them- Put on your headphones and then pull the ear cups down until they rest comfortably over the ears. Make sure you have them the right way round by observing the “R” (right) and “L” (left) markings on the ear cups. For optimum sound quality, ensure that the ear cups are not covered. FROM THE MANUFACTURER Sennheiser HD 650 With 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. * Balanced & transparent sound * Elegant titanium-silver finish * Optimized for hi-resolution recordings * Made in Ireland Learn more about the HD 650 Features a 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. 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 * Neodymium ferrous magnet systems ensure optimum sensitivity and an excellent dynamic response * Exceptionally natural, spatial and accurate sound * Can be directly connected to stationary hi-fi components of the highest quality, in particular SACD, DVD-A and CD players * Peace of mind - thanks to the 2-year international warranty Did you know? The HD 650 is a true audiophile headphone that features extremely lightweight aluminium voice coils to ensure excellent transient response. Sennheiser recommends this headset for... ... The HD 600 is geared for your hi-fi stereo system. Best suited for all types of audio the HD 600 is a favorite among mastering engineers worldwide. Warranty The HD 650 is covered by a 2-year international warranty. Comparison table HD 600 HD 650 Frequency response 12 - 39000 Hz 10 - 39500 Hz Impedance 300 ohms 300 ohms Transducer principle Dynamic, open Dynamic, open Sound pressure level (SPL) 97 103 dB THD, total harmonic distortion 0.1 % 0.05 % Weight w/o cable 0.57lb (260 g) 0.57lb (260 g) Contact pressure ca. 2,5 N ca. 2,5 N Ear coupling Circumaural Circumaural Jack plug 1/4" / 1/8" (3.5/6.3 mm) stereo 1/4" / 1/8" (3.5/6.3 mm) stereo Warranty 2 Years 2 Years Why Sennheiser ? For over 60 years every Sennheiser mic or headphone comes with a built-in mission: to stay true to the sound and soul the music was given by its artist. From the fragile intimacy of a whispered word to the deep and dark punch of an attacking bassline. Sennheiser delivers pure emotion and excitement. A quality that has convinced a broad spectrum of artists and of course music lovers all over the world. Sennheiser offers a great experience for everyone who really wants to hear. What's in the box? * HD 650 * 1 adaptor to 1/4" (6.3 mm) See more

Cable length 118 inches. Lightweight aluminum voice coils for very fast transient response. High power neodymium magnets deliver maximum efficiency; 3.5 millimetre jack plug. Frequency response (Headphones):10 41000 Hz. Hand selected matched driver elements; Highly optimized magnet systems for minimum harmonic and inter modulation distortion. Improved frequency response is 10 39,500 Hertz ( 10 dB). Specially designed acoustic silk ensures precision damping over the entire frequency range and helps to reduce THD to an incredible 0.05 percent.