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HD424; Sennheiser (ID = 1085603) Speaker-P
HD424; Sennheiser (ID = 1085604) Speaker-P
HD424; Sennheiser (ID = 303746) Speaker-P HD424; Sennheiser (ID = 742906) Speaker-P
HD424; Sennheiser (ID = 762594) Speaker-P HD424; Sennheiser (ID = 1192407) Speaker-P
HD424; Sennheiser (ID = 1807151) Speaker-P HD424; Sennheiser (ID = 1807152) Speaker-P
HD424; Sennheiser (ID = 1807153) Speaker-P
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HD424; Sennheiser (ID = 303746) Speaker-P
Sennheiser: HD424 [Speaker-P] ID = 303746 700x525
Select picture or schematic to display from thumbnails on the right and click for download.
For model HD424, Sennheiser Electronic (Labor W); Wennebostel
Country:  Germany
Manufacturer / Brand:  Sennheiser Electronic (Labor W); Wennebostel
Year: 1973–1978 Category: Loudspeaker, headphone or earphone
Wave bands - without
Power type and voltage No Power needed
Loudspeaker - Is a Headphone or Earphone
Power out
from Model: HD424 - Sennheiser Electronic Labor W;
Material Plastics (no bakelite or catalin)
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)

Model page created by Günther Stabe † 19.8.20. See "Data change" for further contributors.

All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel
Here you find 281 models, 264 with images and 127 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.