• Country
• Germany

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

• Year
• 1992 ??

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 144796

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

• Wave bands
• - without

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 2,4 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Stereo-Kopfhörer HDI550 - Sennheiser Electronic Labor W;

• Notes
• Infrarot- Stereokopfhörer, Trägerfrequenzen 2,3/2,8 MHz, Modulationsverfahren FM, 18 Hz - 24 kHz, Klirrfaktor <0,8%, Störabstand typ. 64 dB (A), Betriebszeit ca. 4 Std. pro Akkustecker, max. Schalldruck 105 dB, Gewicht mit Akkustecker 170 Gramm.

• Net weight (2.2 lb = 1 kg)
• 0.170 kg / 0 lb 6 oz (0.374 lb)

• 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 292 models, 277 with images and 133 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel