Reference Power Amplifier M-90

Pioneer Corporation; Tokyo

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  • Year
  • 1986–1988
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 262278

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC)
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 400 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Reference Power Amplifier M-90 - Pioneer Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 457 x 154 x 430 mm / 18 x 6.1 x 16.9 inch
  • Notes

  • A hi-fi stereo power amplifier housed in a metal case with wooden side panels with continuous average power output of 2 x 200 watts into 8 ohms. Partner to the Pioneer C-90 Reference Control Amplifier. With Pioneer's "Non-switching" type II circuit for the power output stage. The power supply features two outsize transformers, large electrolytic capacitors (total capacitance of 48,000µF) and four bridged rectifier circuits with fast-recovery diodes. In the power amplifier, 16 high-power transistors (8 per channel) are used in a "four-in-parallel" configuration.

    Specification  
    Continuous average power output

         		 200 watts per channel min. into 8Ω
    from 20Hz to 20,000Hz
    with no more than 0.003% THD
    DIN power
    (both channels driven) 1kHz, 0.7%, 8Ω
    250W + 250W
    Dynamic power (EIA test signal)
     8Ω
     4Ω
     2Ω
    300W + 300W
    550W + 550W
    800W + 800W
    Harmonic distortion
     20Hz — 20kHz, 200 W, 8Ω
    0.003%
    Cross modulation distortion
     During effective output
    0.002%
    Input terminals
    (sensitivity/input impedance)    		  
     CONTROL AMP IN, CD DIRECT IN,
      LINE DIRECT IN
    1V/50kΩ
    Frequency response  
     CONTROL AMP IN, CD DIRECT IN,
      LINE DIRECT IN
    20Hz — 20kHz +0dB,-0.1dB
    S/N ratio
    (short circuit, A network)    		  
     CONTROL AMP IN, CD DIRECT IN,
      LINE DIRECT IN
    125dB
       
    Leistungsaufnahme (max.) 1. 300 W (230 V)
    DIN-Leistung 2 × 250 W (1 kHz, 0,7 %, 8 Ohm)
    Ausgangsleistung:
         		 2 × 200 W Sinus (20 – 20. 000 Hz an 8 Ohm
     bei Klirrfaktor > 0,003 %)
    Musikleistung:
     
         		 2 × 300 W an 8 Ohm,
    2 × 550 W an 4 Ohm,
    2 × 800 W an 2 Ohm
    Klirrfaktor (20 – 20. 000 Hz) 0,003 %
    Frequenzgang 20 – 20. 000 Hz  +0 /-0,1 db
    Signal Rauschabstand 125 dB

    Versions/Power requirements

    KU USA 120V AC 60Hz
    HE Europe 220V AC 50/60Hz
    HEZ W Germany 220V AC 50/60Hz
    HB UK 240V AC 50/60Hz
    S/G US Military 110/120/220/240V AC 50/60Hz with voltage selector

    Power consumption:   430 Watts (KU), 1300 Watts (HE, HEZ, HB, S/G)

  • Net weight (2.2 lb = 1 kg)
  • 22.6 kg / 49 lb 12.5 oz (49.78 lb)
  • Mentioned in
  • - - Manufacturers Literature (1986 & 1987 Hi-Fi Components catalogues)
  • Literature/Schematics (1)
  • -- Original-techn. papers. (1988 Pioneer Elite Hi-Fi Components catalogue)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Service manual Pioneer M-90 dated June 1986)
  • Author
  • Model page created by Christian Wiebel. See "Data change" for further contributors.

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