• Country
• Germany

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

• Year
• 1973–1978

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 113624

Click on the schematic thumbnail to request the schematic as a free document.

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - Is a Headphone or Earphone

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: HD424 - Sennheiser Electronic Labor W;

• Notes
• Dynamischer Hörer, offene Bauform, 2× 1750 Ohm; Nachfolger des legendären Hörers HD414, jetzt mit zusätzlichem Bügelpolster und größeren Muscheln. Austauschbare luftdurchlässige Schaumstoffpolster.

• Price in first year of sale
• 100.00 DM

• Source of data
• Handbuch VDRG 1977/1978

• Mentioned in
• Funk-Technik (FT) (9/1973, S. 303 / Neuvorstellung, Werbeanzeige)

• Author
• Model page created by Günther Stabe † 19.8.20. 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