Akai GX-625 Service Manual

Specifications and Main Features

  • Model: GX-625 (black panel type also applies)
  • Track System: 4 Track 2 Channel Stereo System
  • Reel Capacity: Maximum of up to 10-1/2 inch reel
  • Heads: Erase head x 1, GX recording head x 1, GX playback head x 1
  • Motors: AC servo motor for capstan drive x 1, AC eddy current motors for reel drive x 2
  • Tape Speed:
  • 19 cm/s + 0.8% (7-1/2 ips)
  • 9.5 cm/s + 1.0% (3-3/4 ips)
  • Pitch control: over + 6%
  • Wow & Flutter:
  • At 19 cm/s, less than 0.03% WRMS, 0.08% DIN 45500
  • At 9.5 cm/s, less than 0.04% WRMS, 0.10% DIN 45500
  • Tape Winding Time: 130 sec. using 2400 ft. 740 m tape
  • Frequency Response:
  • 30 to 26000 Hz + 3 dB at 19 cm/s
  • 30 to 19000 Hz +3dB
  • Signal to Noise Ratio: Better than 62 dB at 19 cm/s DIN 45500; better than 60 dB at 9.5 cm/s DIN 45500
  • Harmonic Distortion: 0.5% best
  • Input:
  • MIC: 0.25 mV (input impedance 2.4 kohms), Need microphone impedance: 600 ohms
  • Output:

Line: 775 mV at 0 VU, load impedance required: not less than 20 kohms Line: 70 mV (input impedance 100 ohms) - Phone: 100 mV/8 ohms at 0 VU - DIN Input: 2 mV (input impedance: 10 kohms) - Output: 755 mV, load impedance required: not less than 20 ohms.

  • Output_Spec: 440 (W) x 446 (H) x 241 (D) mm (17.3 x 17.6 x 9.5")
  • Weight: The metric units are 17.6 kg (38.9 lbs)
  • Requirements for Power: Power supply for specific regions: For Japan: 100V 50/60 HZ Power supply for US & Canada 120V 60 Hz For Australia/Kenya/Europe; 220v/240V switchable 50HZ - 110/120/220/240V.50/60 HZ for other regions.
  • Power Consumption** Allowable Power: Japan: 80W, CSA, AAL: 150 W, U/T: 150 W

Frequently Asked Questions

Q1: What type of tape does the GX-625 use?

A1: A 4 Track 2 Channel stereo system tape compatible with the GX-625 machine which can use reels of size up to 10-1/2 inches.

Q2: How is the tape speed changed?

A2: The tape speed selector allows adjusting the speed to either 19 cm/s (7-1/2 ips) or 9.5 cm/s (3-3/4 ips).

Q3: What is the power rating of the GX-625?

A3: CSAAAL–UT models require 80W, while other versions of the GX-625 require 150W.

Q4: What is the weight of the GX-625?

A4: The weight of the GX-625 is 17.6 kg (38.9 lbs).

Q5: Is it possible to change the voltage in the GX-625?

A5: Yes, the GX-625 has a voltage selector switch for easier use in different countries.

Q6: What is the frequency response characteristics for GX-625?

A6: For GX-625, the frequency response ranges from 30-26000 Hz +3dB when using 19 cm/s, and 30–19000Hz +3 dB when 9.5 cm/s.

Q7: What is the largest size April reel compatible with GX-625?

A7: The maximum reel diameter compatible with the GX-625 is around 10-12 inches.

User Manual

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Akai GX-625 Service Manual
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