• Country
• Japan

• Manufacturer / Brand
• Yamaha Co.; Hamamatsu

• Year
• 1982

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 156499

• • 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) / 100 Volt

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

• Power out
• 80 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Natural Sound Stereo Amplifier A-4D - Yamaha Co.; Hamamatsu

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 435 x 112 x 300 mm / 17.1 x 4.4 x 11.8 inch

• Notes
• Stereo Amplifier, 2 x 40 watts into 8 ohms. 20Hz-20kHz -0.2dB. For the japanese market (100 Volt mains).

• Net weight (2.2 lb = 1 kg)
• 5.9 kg / 12 lb 15.9 oz (12.996 lb)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• 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