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Sound Rating: 8.5 / 10 Avg.Price: 1250 # Owners: 2
Relaibility Rating: 9 / 10 Views: 401 # Reviews: 1

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Technical Details

Brand: Akai


Category:Super High Fidelity (Reserved for top-end recorders)


Electronic:Solid State

Country of Manufacture:Japan

Release dates: -

Tracks:1/4 Rec/PB

Speeds: 3 3/4, 7 1/2

Max Reel Size("): 10.5"

Number of heads: 6

Head Composition: Ferrite/Glass

Head Configuration: Stereo

# Motors: 3

Auto Reverse?:Yes

Voltage(s): 110-120v, 220-240v

Frequency Response:7½ ips: 30Hz to 27kHz ( 3dB)

Wow and Flutter:Less than 0.03% at 7½ ips

Signal-to-Noise Ratio:better than 65 dB

Sound quality rating:7 / 10

Long-term reliability rating: 8 / 10

Additional Details


The GX635 and 636 were very similar, all having a symmetrical 6-head design (Glass Crystal) which permitted both playback and recording in both directions.
The GX-635D was the first unit in the series (1979) and was very likely Akai’s first recorder with IC logic controlled tape function controls. It had a pitch control function, recording mute and a programmable record
timer. Line and mic mixing was also possible with separate microphone and line-in level controls. These controls were fitted with a “memory ring” which rotated when the level was increased but remained in
position when decreased, giving a ‘memory’ of the setting. The direct drive, AC servo capstan motor is frequency-controlled.

Akai also marketed a GX-635DB with Dolby B which did not have the timer switch. Both models were also available with a flat black finish but were sold in smaller quantities as silver was still holding greater popularity for audio equipment of the time.


Additional Info

Dimensions: 19 x 17.3 x 10″ (483 x 440 x 256mm)  Weight: 46.4 lbs (21.0 kg)

Weight: 21kg   Rewind speed: 120 seconds for a 1800 ft tape

Distortion: 0.4%  Inputs: Mic: 0.25 mV. Line: 70 mV impedance 100 Kohm. DIN: 2mV / 10Kohm

Outputs: Line: .775 / 20 Kohm.

Headphones: 100 mV at 8 ohms. DIN 0.3V


Excellent fiability and sound. Works perfectly since 1985. No parts changed. 

Sound: 10
Performance: 10
5 months ago

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