Sennheiser HD650 DescriptionSennheiser HD650 Open Back Headphones. The vital part of today's audiophile music generation. HD650 is the follow-on from the award winning HD600 audiophone from Sennheiser. Improved materials enable the Sennheiser HD650 to reproduce superior acoustics and enhance listening pleasure. The formidable Sennheiser HD 650 headphones are fit for a king. CNET
The accurate trebles of the HD650, united with its balanced, deep bass permit the listener to benefit from natural sound replication. High-quality metal mesh covers deliver fantastically open and translucent sound. To round off the package, the Sennheiser HD650 incorporate computer-optimised neodymium magnet systems to minimise harmonic distortion. Celebrated for superior comfort, the HD650 also come with a new designed headband resulting in consistent, undisturbed sound as the headphones stay at their position, even when your head is in motion. Sennheiser HD650 - superior open, dynamic stereo headphones engineered for music - your music! 
Sennheiser HD650 Features- Top-of-the-range open, dynamic hi-fi stereo headphones engineered for music
- Hand-selected, matched headphone systems with very tight tolerances (+/- 1 dB)
- Computer-optimised magnet systems for minimising harmonic and intermodulation distortion
- Extremely lightweight aluminium voice coils ensure accuracy and fast transient response
- Neodymium ferrous magnet systems for high efficiency
- Specially developed acoustic silk provides uniform damping over its entire frequency range as well as minimising IM and harmonic distortion
- Elegant silver-titanium finish
- High-quality metal mesh covers for superbly open and transparent sound
- Extremely natural, spatial sound image
- Balanced, crisp bass and deep bass reproduction
- Authentic voice reproduction
- Specially developed OFC copper cable, Kevlar-reinforced, insensitive to handling noise
- Gold plated 1/4" jack plug with adapter lead to 3.5 mm jack plug
- 2-year Sennheiser warranty
Sennheiser HD650 ReviewsT3 Magazine Evaluates Sennheiser HD650 - Unbeatable!
"Cracking sound quality and unbeatable comfort"
onHeadphones.com HD650 Review - 5 Stars
"Liquid sounding midrange that infuses vocals with great resolve and soul. Warm, punchy bass that gives rock music a very solid foundation. Comfortable to wear for many hours." CNET Evaluates Sennheiser HD650 Audiophile Headphones
"Sennheiser's flagship headphones have high-tech styling, extraordinary bass response, and an extremely comfortable design." 
The Sennheiser HD650 Sound- Exceptionally natural, spatial and accurate sound
- Suitable for all types of music
- Balanced, contoured bass
- Real deep bass reproduction
- Exceedingly authentic voice reproduction
- Unobtrusive, natural strings and wind instruments
- Pleasantly natural trebles
- Silvery, clear cymbals
Sennheiser HD650 Technical Specification- Nominal impedance 300 Ohm
- Contact pressure ca. 2.5 N
- Weight w/o cable ca. 260g
- Jack plug 6.3/3.5 mm stereo
- Transducer principle (Headphones) open, dynamic
- Ear coupling circumaural
- Cable length 3 metre
- Frequency response (headphones) 10.....39500 Hz
- Sound pressure level (SPL) 103 dB (1 Vrms)
- THD, total harmonic distortion 0.05 %

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