Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Japan
Release dates:1979 - 1984
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy, Ferrite/Glass
Head Configuration: Stereo
# Motors: 3
Voltage(s): 110-120v, 220-240v
Frequency Response:( 3dB): 7½ ips: 30Hz to 24k Hz
Wow and Flutter:less than 0.08% @ 7½ ips
Signal-to-Noise Ratio:GX-4000D: better than 60 dB at 7½ ips GX-4000DB: better than 70 dB at 7½ ips
Sound quality rating:6 / 10
Long-term reliability rating: 8 / 10
Selling right up until 1984 and still one of the most popular Akai recorders today on the 2nd hand
market, the GX-4000D was an improved version of the 4000DS MKII, using Akai’s GX heads (with a guaranteed 150,000 hours use and a higher frequency response).
Improvements/modification included: re-location of the track selector switch (now next to the head cover instead of on top of it). an extra output level control on the front panel. the capstan speed change sleeve
was hidden under the head cover when not in use. and 50% LESS wow and flutter than the earlier 4000DS mk II.
The DB version was equipped with Dolby Noise reduction, the Dolby switch replacing the Sound On Sound switch on the GX-4000D. The GX-4000DB, however, still retained the SOS function via a pull-switch on the left line-in knob.
This unit was also available with a matt-black panel.
Distortion: less than 1% (1,000 Hz “0” VU) / Rewind speed: 200 sec. using a 1,200 ft tape at 50 Hz / Inputs: Mic: 0.25 mV. required impedance: 600 ohms Line: (2) 70 mV DIN: 2mV / Outputs: line: 0.775V (“0″ VU). req’d load impedance: more than 50 kohms headphones: 100mV at 8 ohms DIN: 2mV / Dimensions: 12.4 x 17.3 x 9” (315 x 440 x 230mm) / Weight: 29 lbs (13.2 kg) / quarter-track stereo