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Akai GX-400D Pro

Stereo Tape Deck (1974-75)

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Akai GX-400D Pro


Track system: auto reverse, 4-track, 2-channel, stereo/monaural system

Heads: 2 x playback, 2 x record/erase

Motor: 1 x capstan, 2 x reel

Reel size: up to 10.5 inch reel

Equalization: NAB

Tape speeds: 3 34  7 12  15 ips

Wow and flutter: 0.07% (15 ips)

Frequency response: 20Hz to 30kHz (15 ips)

Signal to Noise Ratio: 54dB

Total harmonic distortion: 1%

Crosstalk: 50dB

Input: 70mV (line), 15mV (DIN), 0.6mV (mic)

Output: 0.775V (line)

Semiconductors: 93 x transistors, 87 x diodes

Dimensions: 457 x 590 x 240mm

Weight: 31.2kg

Year: 1974

Price: USD $1200 (1974)


service manual   English - Olle Stal

parts list   English - Olle Stal

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Reviewed Jun 11th, 2016 by Keith Shultz

You are so right Taarzaahn!

I own all 3 different 400Ds and as far as I'm concerned there just great. Each has its own Disposition but in the end, they just make-your-day! The 'Pro' gives you the best of Two Worlds. The 'D-SS' is... (with a little extra Electronic), even able two simulate Dolby recordings. And when used as a Quad Recorder you really feel like your floating! And the ‘400D’ is just wonderful in BOTH Directions!

Reviewed Jan 21st, 2016 by Taarzaahn

Still one of the best R2R ever made and still in good shape after 42 years in use.



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