Sennheiser HD 420 specifications

Category : headphones

Brand : Sennheiser

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Tech nical data

Special equipment

Other models of the same series:

  • Manufacturer: Sennheiser
  • Model: HD-420
  • Years of construction: 1979
  • Manufactured in: Germany
  • Weight: 129 g
  • Factory price (RRP): approx. 150 DM (75 €)
  • Principle: Dynamic, open
  • Coupling to the ear: Superimposed on the ear
  • Impedance: 600 Ohm s
  • Rated load capacity:
  • Pressing force:
  • Frequency range: 18 - 20,000 Hz
  • Total harmonic distortion:
  • Sound pressure:
  • Plug: 5-pin DIN/6.3 mm jack
  • Cable length: 3 m
  • The cable is inserted into both ear cups with special plugs and can be replaced.
  • The plastic of the headband is not chemically stable and feels sticky after a few years.
  • The golden foam insert on the outside of the auricle decomposes over the years and crumbles out.


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