• Country
• Japan

• Manufacturer / Brand
• Yamaha Co.; Hamamatsu

• Year
• 1979/1980

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 103743

• • alternative name: Nippon Gakki

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 240 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case

• from Radiomuseum.org
• Model: Natural Sound Stereo Amplifier A-550 - Yamaha Co.; Hamamatsu

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 435 x 111 x 334 mm / 17.1 x 4.4 x 13.1 inch

• Notes
• 55 W Sinus at 8 Ohm;
  Channel inputs: tape1, tape2, tuner, phono;
  outputs: two switchable stereo loudspeaker groups, 8 Ohm totally; rec.out with source selector for tape1 and 2; no integreated circuits,
  55 W Sinus an 8 Ohm je Kanal;
  Eingänge: Tonband1, Tonband2, Empfänger, Plattenspieler;
  Ausgänge: zwei schaltbare Stereo-Lautsprecher-Gruppen; Tonbandausgang für Aufnahme, Quelle getrennt einstellbar.

• Source of data
• -- Collector info (Sammler)

• Other Models

• Here you find 769 models, 736 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