Akai Professional GX-400D

Specifications (* guaranteed)

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

Heads: (4) 2 x GX record/erase, 2 x GX play

Head Composition: Glass

Motor: 2 x reel, 1 x capstan

Auto Reverse?: No

Reel size: up to 10.5 inch reel

Tape speeds: (3 3⁄4  7 1⁄2  15 ips) 9.5 19 38 cm/s

Wow and flutter:

0.035% typ  (15 ips) 38cm/s

0.05% typ (7 ½ ips) 19 cm/s

0.08% typ (3 ¾ ips) 9.5 cm/s

Frequency response (±3dB):

20Hz to 30kHz typ 30Hz to 27kHz * (15 ips) 38 cm/s

20Hz to 28kHz typ 30Hz to 24kHz * (7 1/2 ips) 19 cm/s

30Hz to 20kHz typ 30Hz to 17kHz * (3 3/4 ips) 9.5 cm/s

20Hz to 28kHz typ 30Hz to 24kHz * (15 ips) 38 cm/s

20Hz to 26kHz typ 30Hz to 22kHz * (7 1/2 ips) 19 cm/s

30Hz to 19kHz typ 30Hz to 15kHz * (3 3/4 ips) 9.5 cm/s

Signal to Noise Ratio: 54 dB (48dB*)

Total harmonic distortion: 1% (2% - 2% - 3% *) (3 3⁄4  - 7 1⁄2 -  15 ips) 9.5-19-38 cm/s

Crosstalk: 45dB 3 vu recording (70 dB 60 dB* monaural)

Input: 100mV (line), 5mV (DIN), 0.5mV (mic)

Output: 1.23V (line), 0.6V (DIN)

Sound Quality Rating: 7 / 10

Long-Term Reliability Rating: 7 / 10

Semiconductors: 93 x transistors, 87 x diodes

Dimensions: 457 x 590 x 240mm (18” x 23.2” x 9.5”)

Weight: 31.2kg (68.7 lbs)

Original Price: $1495

Release Dates: 1973-1975

Other products: GX-400-SS (2/4 channel 4 Vu) GX-400 Pro (2 channel 2 Vu)