Reference Stereo Amplifier A-777

Pioneer Corporation; Tokyo

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  • Year
  • 1991/1992
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 218666

 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) / 220-230/240; 110/120-127/220/240 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 200 W (undistorted)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Reference Stereo Amplifier A-777 - 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 hi-fi stereo integrated amplifier housed in a black metal case with continuous power output of 2 x 100 watts into 8 ohms, 2 x 135 watts into 4 ohms. With Bass and Treble tone controls, push button switches for Phono EQ, Loudness, ADPT1/TAPE3, Direct and Muting, rotary switch for Speakers (A,B, A+B) and Phono selector (MM, MC, MM Subsonic, MC Subsonic) and a jack for headphones. On the back, RCA phono sockets for input PHONO, TUNER, CD, and LINE, for input/output TAPE1/DAT, TAPE2, ADAPT1/TAPE3 and ADAPT2 (I/O connected together with removable links) and terminals for 2 pairs of loudspeakers (A, B).  The General Export (SD) model also has 3 100W AC outlets.

    Similar to the Pioneer A-51 Reference Stereo Amplifier (US model).

    Specification  
    Continuous average power output
    min. into 8 ohms
    from 20Hz—20kHz)
    with no more than 0.007% THD


    100W + 100W
    DIN Continuous power output
    (both channels driven at 1kHz)
     THD 1.0%, into 8Ω
     THD 1.0%, into 4Ω

    100W + 100W
    150W + 150W
    Power bandwidth 0.05%, 8Ω 5Hz—80kHz
    Damping factor
    (1kHz/20Hz—20kHz), 8Ω
    150/70
    Dynamic power output
    (on EIA dynamic test signal)
     4Ω/2Ω

    220W/350W
    Total harmonic distortion
     20Hz—20kHz, 95W, 8Ω
     20Hz—20kHz, 140W, 4Ω
    0.007%
    0.009%
    IM distortion (at rated output) 0.007%
    Input sensitivity/impedance
     PHONO (MM)
     PHONO (MC)
     CD, TUNER, LINE, TAPE
    2.5mV/50kΩ
    0.2mV/100Ω
    150mV/50kΩ
    Output level/impedance
     TAPE REC, ADAPTOR OUTPUT
    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
    Filter (SUBSONIC) 17Hz (12dB/oct.)
    S/N ratio
    (IHF short circuit, A network)
     PHONO (MM, 5mV input)
     PHONO (MC, 0.5mV input)
     CD, TUNER, LINE, TAPE

    94dB
    76dB
    110dB
    S/N ratio
    (DIN, continuous power/50 mW)
     PHONO (MM)
     CD, TUNER, LINE, TAPE

    74dB/68dB
    92dB/70dB

    Versions/Power requirements

    HE Europe 220-230/240V AC 50/60Hz switchable
    HEWZ Germany 220-230/240V AC 50/60Hz switchable
    HB UK 220-230/240V AC 50/60Hz switchable
    SD General 110/120-127/220/240V AC 50/60Hz with voltage selector

    Power consumption:  820 watts

  • Net weight (2.2 lb = 1 kg)
  • 19 kg / 41 lb 13.6 oz (41.85 lb)
  • Source of data
  • -- Original prospect or advert
  • Mentioned in
  • - - Manufacturers Literature (1992 Pioneer Hi-Fi Baustein katalog)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service manual Pioneer A-51 A-777 A-878 dated May 1991)
  • Literature/Schematics (2)
  • - - Manufacturers Literature (Operating Instructions Pioneer A-777 A-676 dated 1991)

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