AUDIO EQUIPMENT AC-24: Sennheiser HD 650 Open-Aire, Audiophile-Grade Hi-Fi Stereo Headphones (Item #HD 650)

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The Sennheiser HD 650 offer audiophiles a truly unique natural sounding experience. With sound this good, long concerts in the comfort of your home are a certainty. Setting the standard in comfort and convenience, the HD 650 is a genuine masterpiece - satisfying the most demanding listener.

This is the perfect addition to your high-end home entertainment system. Hand-picked components, special acoustic materials, and exceptional engineering make these headphones an audiophile's dream.


  • 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
  • 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


  • Cable length: 9.8 ft. 
  • Contact pressure: Approx. 2.5 N
  • Ear coupling: Around-the-ear
  • Frequency response: 10-39,500 Hz
  • Jack plug: 6.3/3.5 mm stereo
  • Nominal impedance: 300 
  • Sound pressure level (SPL): 103 dB (1 Vrms)
  • Total harmonic distortion (THD): 0.05 %
  • Transducer principle: Open, dynamic
  • Weight: Approx. 9.2 oz. (without cable)

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