• Country
• Japan

• Manufacturer / Brand
• Onkyo, Osaka Denki Onkyo K.K.; Osaka

• Year
• 1972–1974 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 213984

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

• Number of Transistors
• 39

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Hi-Fi equipment

• Power type and voltage
• Alternating Current supply (AC) / 110-220; 220-240 Volt

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

• Power out
• 70 W (125 W max.)

• Material
• Metal case

• from Radiomuseum.org
• Model: Stereo Amplifier A-7055 - Onkyo, Osaka Denki Onkyo K.K.;

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 423 x 136 x 358 mm / 16.7 x 5.4 x 14.1 inch

• Notes

• also 18 diodes & 2 Thermistors

  From Service manual:

  26W per channel 8 Ohms, both channels driven, 33W single channel

  36W per channel 4 Ohms, both channels driven, 45W single channel

  0.1% THD at rated power, 0.03% at 10W

  Main amplifier 10Hz to 70KHz (+0 -1dB)

  Magnetic cartridge input with 3 gain settings:  -6 dB , 0 dB, +6 dB

  T-4055 is companion Tuner (MW (BC)  & FM-VHF) covered in the same service manual.

   

   

   

• Net weight (2.2 lb = 1 kg)
• 9.3 kg / 20 lb 7.8 oz (20.485 lb)

• Author
• Model page created by Sándor Selyem-Tóth. See "Data change" for further contributors.

• Other Models

• Here you find 639 models, 616 with images and 62 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Onkyo, Osaka Denki Onkyo K.K.; Osaka