Akai GX-747-DBX

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Data[edit]

General

  • Manufacturer: Akai
  • Model: GX-747 DBX
  • Type: Tape machine
  • Years of manufacture: 1982 - 1984
  • Made in: Japan
  • Color: Silver, Black
  • Remote control: yes, either cable remote control RC-21 or infrared RC-90
  • Power consumption: 80 W
  • Dimensions: 440 x 493 x 256 mm (WxHxD)
  • Weight: 23,2 kg
  • Original price approx.: 3'100 DM
  • Optional accessories:
    • RC-21 wired remote control: 6'000 Yen (Japan, 1982), equivalent to about 90 DM
    • RC-90 Infrared remote control: 18'000 Yen (Japan, 1982), equals about 270 DM

DC-635 hood:

    • RH-12-J NAB adapter:
    • AH-15-J Head Demagnetizer:
    • OR-100 Rack:


Connectors

  • Number of outputs:
    • Line 0.775 V at 0 VU

DIN 0.3 V

    • Headphone 6,3 mm jack
  • Number of inputs:
    • Microphone 0.25 mV (5.0 kohm) 2x 6.3 jack
    • Line 70 mV
    • DIN 2.0 mV


Technical Data

  • Max. coil diameter: 26,8 cm
  • Drive: 3 motors

AC Servo Motor for Capstan-drive 1x AC Eddy current Motor for Reel 2x

  • Heads: 6x

2x GX heads recording

    • 2x GX heads playback
    • 2x erase heads
  • Tracks: Quarter track, 2-channel, stereo
  • Tape speeds:
    • 19.0 cm/ s ± 0.8 %
    • 9,5 cm/ s ± 1,0 %
  • Synchronisation fluctuations:
    • <0.03 % WRMS, 0.07 % DIN 45500 at 19.0 cm/ s
    • <0.04 % WRMS, 0.09 % DIN 45500 at 9.5 cm/ s
  • Frequency response:
    • 25 - 33,000 Hz ± 3 dB at 19.0 cm/ s

25 - 26,000 Hz ± 3 dB (0 VU)

    • 25 - 25,000 Hz ± 3 dB at 9.5 cm/ s
    • 25 - 15,000 Hz ± 3 dB (0 VU)
  • Signal-to-noise ratio:
    • DBX Off: > 63 dB (19cm/s
    • DBX On: > 100 dB (19cm/s)
    • DBX On: > 128 dB (19cm/s, 1Khz)
  • External voltage spacing: ~60 dB
  • Distortion: <0.4% at 19.0 cm/ s
  • Equalization:
  • Crosstalk attenuation:
  • Cancellation attenuation:
  • Premagnetization and extinction frequency:


Special Features

  • Auto-Reverse
  • DBX
  • Pitch Control
  • Timer Start
  • Bias Adjust
  • Auto Mute


Remarks[edit]


Pictures[edit]

  • Image: Akai GX-747 DBX in black

Akai GX-747 DBX-2.jpg


  • Picture: Akai GX-747 DBX in Silver

Akai GX-747 DBX-3.jpg


Reviews[edit]

Links[edit]

  • External link to website "The Vintage Knob": [[1]]