Reference Stereo Amplifier A-656

Pioneer Corporation; Tokyo

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  • Year
  • 1989
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 209798

 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) / 120; 110; 120-127; 220; 240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 140 W (190 W max.)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Reference Stereo Amplifier A-656 - Pioneer Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 420 x 162 x 435 mm / 16.5 x 6.4 x 17.1 inch
  • Notes

  •  A stereo hi-fi integrated amplifier with output power of 70 watts RMS per channel into 8 ohms or 95 watts RMS per channel into 4 ohms, housed in a black or silver metal case (the latter available in West Germany only is referred to as the A-656-S model in the Service Manual). Push button switches for Loudness, Adapt/Tape3 and Direct, rotary Bass and Treble tone controls, rotary switches for Speakers (Off, A, B, A+B), Rec Selector (Tape 2→1, Tape 1→2, Source, Off, CD, Tuner), Input Selector (Tape2, DAT/Tape1, CD, Phono, Tuner and Line), and Phono Selector (MC Subsonic, MC, MM, MM Subsonic) and a jack for Phones. On the back, RCA phono input sockets for CD, Tuner, Line and Phono, input/output sockets for DAT/Tape1 and Tape2, input/output sockets for Tape3 or for connection to an equalizer, terminals for two pairs of Loudspeakers (A, B) and 3 AC outlets on the General Export model.

    Specification  
    Continuous power output
    (both channels driven at 20Hz-20kHz)    		  
      T.H.D. 0.005%, 8Ω
      T.H.D. 0.008%, 4Ω    		 70W + 70W
    95W + 95W
    Power bandwidth 5Hz-80kHz (T.H.D. 0.05%, 8Ω)
    Damping factor (1kHz/20Hz-20kHz) 8Ω 200/70
    Dynamic power output
    (on EIA dynamic test signal)    		 150W/190W (4Ω/2Ω)
    Intermodulation distortion (at rated output) 0.005%
    Input sensitivity/impedance  
      PHONO (MM)
      PHONO (MC)
      CD, TUNER, LINE, TAPE    		 2.5mV/50kΩ
    0.2mV/100Ω
    150mV/50kΩ
    Output level/impedance  
      TAPE REC 150mV/2.2kΩ
    Frequency response  
      PHONO (MM)
      PHONO (MC)
      CD, TUNER, LINE, TAPE    		 20Hz-20kHz ±0.2dB
    20Hz-20kHz ±0.3dB
    1Hz-150kHz +0dB,-3dB
    Signal-to-Noise ratio
    (IHF short circuit, A network)    		  
      PHONO (MM, 5mV input/MC, 0.5mV input)
      CD, TUNER, LINE, TAPE    		 95dB/77dB
    110dB

    Versions/Power requirements

    HEZ West Germany model 220V and 240V (Internally switchable)
    HE European Continent model  220V and 240V (Internally switchable)
    HB United Kingdom model 220V and 240V (Internally switchable)
    KC Canada model 120V only
    SD General export model 110V, 120-127V, 220V and 240V (voltage selector)

    Power consumption:  650 watts

    See also the later Pioneer A-656 Mark II Reference Stereo Amplifier.

    Reference Stereo Amplifier mit 2x 120Watt DIN an 4 Ohm
    Bass-, Treble-Control, Loudness, Low Filter (SubSonic).
    Eingänge: 1x Phono (Cinch): 2,5 mV / 50 kOhm (MM), 0,2 mV / 100 Ohm (MC)
    CD, Tuner, Line, 3x Tape In (Cinch): 150 mV / 50 kOhm
    Ausgänge: 3x Tape Out (Cinch): 150 mV / 2,2 kOhm, Kopfhörer (6,3mm Klinke), 2 Lautsprecher.

  • Net weight (2.2 lb = 1 kg)
  • 13.5 kg / 29 lb 11.8 oz (29.736 lb)
  • Mentioned in
  • -- Original prospect or advert (1989 Pioneer Hi-Fi Components catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual A-656 A-656-S dated 1989)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Operating Instructions A-757 A-656)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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