Stereo Amplifier SB-420

Toshiba Corporation; Tokyo

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  • Year
  • 1977 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 299642
    • alternative name: Shibaura Engineering Works
    • Brand: Tokyo Shibaura

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 220/240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 84 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Stereo Amplifier SB-420 - Toshiba Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 450 x 148 x 375 mm / 17.7 x 5.8 x 14.8 inch
  • Notes

  • Power output:
        42 watts per channel into 8Ω (stereo)
        50 watts per channel into 4Ω (stereo)
    Frequency response: 10Hz to 80kHz +0/-1dB
    Total harmonic distortion:
        0.3% (at flat rated output)
        0.05% (at 1W output)
    Damping factor: minimum 25
    Muting: -10dB or -20dB
    Loudness control: 8.5dB (100Hz) 3.5dB (10kHz)
    Filter: 
        LOW 20Hz (6dB/oct)
        High 8kHz (6dB/oct)
    Output band switch: 5~40kHz 8Ω IHF 0.3% both channel driven
    Input sensitivity: 2.5mV (MM), 150mV (line)
    Signal to noise ratio: 70dB (MM), 90dB (line)
    Output: 150mV (line), 30mV (DIN), 1V (Pre out)
    Speaker load impedance: 4Ω to 16Ω

  • Net weight (2.2 lb = 1 kg)
  • 11.5 kg / 25 lb 5.3 oz (25.33 lb)
  • Author
  • Model page created by Bartosz Szwed. See "Data change" for further contributors.

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