Stereo Graphic Equalizer GR-551

Pioneer Corporation; Tokyo

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  • Year
  • 1987
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 335751

 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; 220/240; 110/120-127/220/240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Stereo Graphic Equalizer GR-551 - Pioneer Corporation; Tokyo
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 420 x 105 x 334 mm / 16.5 x 4.1 x 13.1 inch
  • Notes

  • A 7-band Stereo Equalizer with Spectrum Analyzer housed in a metal case. The 7-band equalizer permits boost and cut up to 10dB at 7 frequency bands channel by channel.
    The 7-band spectrum analyzer monitors the frequency makeup of music, channel by channel. With on/off switches for Equalizer and Analyzer, Tape monitor, with RCA phono sockets for input/output to the Analyzer and Rec/Play for Tape and an AC outlet.

    Superceded by the Pioneer GR-555 Stereo Graphic Equalizer, the same apart from color.

    Specification  
    Input terminals
    (reference input level/impedance)    		  
    INPUT, TAPE PLAY 150mV/50kΩ
    Gain 0dB
    Output terminals
    (reference output level/impedance)    		  
     OUTPUT
     REC OUT    		 150mV/2.2kΩ
    150mV
    Harmonic distortion
    (20Hz—20kHz, output 1V)
    0.03%
    Frequency response
     INPUT, TAPE PLAY
    10Hz—50kHz +0dB,-3dB
    Equalizer bands  
     Center frequencies
     Variable range    		 60Hz, 150Hz, 400Hz, 1kHz, 2.4kHz, 6kHz, 15kHz
    ±10dB
    S/N ratio
    (IHF, A network, short circuit, 1V)
     INPUT, TAPE PLAY

    104 dB
    S/N ratio (DIN)
     INPUT, TAPE PLAY
    85dB
    Spectrum analyzer
     Center Frequencies
     Other
    60Hz, 150Hz, 400Hz, 1kHz, 2.4kHz, 6kHz, 15kHz
    3dB Step, 8 points

    Versions/Power Requirements

    KUC USA, Canada 120V AC 60Hz
    NB UK 240, 220V AC 50/60Hz (Switchable)
    HEZ W Germany 220, 240V AC 50/60Hz (Switchable)
    SD General 110, 120-127, 220, 240V AC 50/60Hz (With voltage selector)
    SD/G US Military 110, 120-127, 220, 240V AC 50/60Hz (With voltage selector)

    Power consumption:  15 watts

  • Net weight (2.2 lb = 1 kg)
  • 4.2 kg / 9 lb 4 oz (9.251 lb)
  • Mentioned in
  • - - Manufacturers Literature (1987 Hi-Fi Components catalogue)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service Manual Pioneer GR-551 dated May 1987)
  • Author
  • Model page created by Howard Craven. See "Data change" for further contributors.

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