• Country
• Germany

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

• Year
• 1980 ??

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 193833

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: HD-424XL - Sennheiser Electronic Labor W;

• Notes
• Dynamischer Hörer, offene Bauform, 2 x 600 Ohm. Frequenzbereich 16 - 20000 Hz, Klirrfaktor 1 %, Nennbelastbarkeit 0,1 W. Austauschbare luftdurchlässige Schaumstoffpolster.

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

• Author
• Model page created by Norbert Haselbach. See "Data change" for further contributors.

• Other Models

• Here you find 295 models, 280 with images and 135 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel