Akai GX-F91 specifications and service manual

Launch year: 1981, Region: Asia, Price: $ 760

SPECIFICATIONS

Track System: 4 track, 2 channel stereo system 

Tape: Philips type cassette 
Tape Speed: 4.76 cm/s ±1% (1-7/8 ips ±1% )

Heads: 

  Super GX-head for recording x1

  Super GX-head for playback x1

  Erase head x1

Motors:

  Quartz Locked PLL servo DC motor for direct capstan drive x1

  DC motor for reel drive x1

Wow & Flutter:

  0.025% WRMS, 
  0.07% WTD(DIN)

Tape winding time:

  90sec using a C-60 cassette tape

Frequency Response:

  Normal 20 to 18,000 Hz ±3 dB (-20VU)
  CrO2    20 to 19,000 Hz ±3 dB (-20VU)
  Metal    20 to 21,000 Hz ±3 dB (-20VU)
                                                                      

Signal to Noise Ratio:

  Metal: Better than 60 dB (measured via tape with peak recording level) 
  Dolby B-type NR switch ON: Improves up to 5dB at 1kHz ,10 dB above 5 kHz 

  Dolby C-type NR switch ON: Improves up to 15dB at 500Hz ,20 dB at 1kHzto 10 kHz 

Harmonic Distortion: 1kHz, 3rd harmonic distortion

Metal: Less than 0,8%   
Input Line: 70 mV  (Input impedance 47kohms)

Output Line: 410 mV at 0 VU

Required load impedance: More than 20 kohms 
Phone:1,3 mV/8 ohms  at 0 VU

DIN Input: 2,0 mV  (Input impedance 10 kohms)

Output: 410 mV. 

Required load impedance: More than 20 kohms

Power Requirements:

  100V  50/60 Hz for Japan                              

  120V/60 Hz for U.S.A. & Canada 
  220V/50 Hz for European Countries except U.K. 
  240V/50 Hz for U.K. & Australia 
  110/120/220/240V (Switchable), 50/60 Hz for the other countries

Dimensions: 440(W) x 100(H) x 363(D) mm, (17.3 x 3.9 x 14.3") 
Weight: 9.8 kg (21.6 lbs) 

Download Akai GX-F91 Service Manual