• Country
• Germany

• Manufacturer / Brand
• Sennheiser Electronic (Labor W); Wennebostel

• Year
• 1986 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 144794

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Power out
• 0.2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Stereo-Kopfhörer HD420SL-2 [50 Ohm-Version, Anschluss PX 2] - Sennheiser Electronic Labor W;

• Notes
• Dynamischer Kopfhörer, offen/ohraufliegend, 18 Hz - 20kHz, Nennimpedanz 50 Ohm, Nennschalldruckpegel bei 1 kHz ca. 94 dB, Klirrfaktor < 1%, Nennbelastbarkeit 0,1 W, Anschlußkabel 3 m mit Universalstecker PX 2,Gewicht ohne Kabel ca. 129 Gramm.

• Source of data
• -- Original-techn. papers.

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 298 models, 282 with images and 137 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel