• Country
• Japan

• Manufacturer / Brand
• Yamaha Co.; Hamamatsu

• Year
• 1979 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 158104

• • alternative name: Nippon Gakki

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC)

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

• Power out
• 200 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Stereo Power Amplifier M-4 - Yamaha Co.; Hamamatsu

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 435 x 145 x 374 mm / 17.1 x 5.7 x 14.7 inch

• Notes
• Natural Sound Stereo Power Amplifier.
  2 x 100 Watt (8 Ohm, 20 - 20.000Hz, Klirrfaktor unter 0,006%).
  Spitzenwert Aussteuerungsanzeige.

• Net weight (2.2 lb = 1 kg)
• 18.5 kg / 40 lb 12 oz (40.749 lb)

• Author
• Model page created by Franz Scharner. 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