• Country
• Japan

• Manufacturer / Brand
• Yamaha Co.; Hamamatsu

• Year
• 1976–1978

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 154187

• • alternative name: Nippon Gakki

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - Is a Headphone or Earphone / Ø 5.5 cm = 2.2 inch

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: Orthodynamic Headphone HP-1 - Yamaha Co.; Hamamatsu

• Notes
• Orthodynamischer Kopfhörer, Frequenzgang 20 Hz bis 20 kHz, Impedanz 150 Ohm, Sensitivität 96 dB/1 mW, Mechanisches Entwurf von Mario Bellini, Schnurlänge 2.35 m, Stecker 6.3 mm Durchmesser, Membran: Polyester 12 Mikron, Ferrit-Magnet 55 mm Durchmesser, Harmonische Verzerrungen < 0.3 % bei 90 dB SPL.

• Net weight (2.2 lb = 1 kg)
• 0.3 kg / 0 lb 10.6 oz (0.661 lb)

• Price in first year of sale
• 146.00 HFl

• Literature/Schematics (1)
• Zeitschrift: DISK 116:80-82,1976 (Niederlande)

• Author
• Model page created by Aren van Waarde. See "Data change" for further contributors.

• Other Models

• Here you find 767 models, 734 with images and 380 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Yamaha Co.; Hamamatsu