Audio Database
GX-365D
Commentary

Tape deck with glass & crystal ferrite head.

The GX 365 d is a tape deck type, and the GX 365 is a tape recorder type with a speaker.

It uses a 3-head system with independent recording, playback, and erasing heads for simultaneous recording and monitoring.

A glass and crystal ferrite head developed by Akai is used for the recording and reproducing heads.
This head is made by applying crystal ferrite (single crystal ferrite) developed for VTR and ultra-precision processing technology for VTR head manufacturing to audio heads. For the first time in the world, single crystal ferrite superior to conventionally used permalloy is used for the core material of head.
The surface of of this head is composed of glass and crystal ferrite, dust does not adhere to it, abrasion is prevented, and excellent frequency characteristics can be obtained by focus field.

A 3-motor configuration is adopted, with a hysteresis synchronous 3-speed motor for the capstan and a 6-pole outer rotor motor for the reel.

Automatic mechanisms such as Compute-0-Matic (automatic recording level control), Reverse-0-Matic (automatic reverse), automatic shut-off and automatic stop are adopted.
With Compute-0-Matic, you can adjust the recording level automatically by simply pressing the set button, and with Reverse-0-Matic, you can reverse as many times as you want until you press the stop button.

Equipped with a changeover switch for SRT tapes, S. R. T. (Super Range Tape) newly developed by Akai can be used.

The electromagnetic brake reliably stops the tape.

You can record overlapping sounds such as sound-on-sound, sound-over-sound, and sound-with-sound.

Operation from a remote location is possible by using the separately sold remote control unit.

Model Rating
Type Tape deck
Tape speed 4.75cm/s, 9.5cm/s, 19cm/s
38cm/s can be handled by using the attached adapter
Tape velocity deviation ± 0.5% or Less (19cm/s)
± 1.0% or Less (9.5cm/s)
± 1.0% or Less (4.75cm/s)
Wow and flutter 0.04% RMS or less (19cm/s)
0.07% RMS or less (9.5cm/s)
0.14% RMS or less (4.75cm/s)
Frequency characteristic 30 Hz to 28 kHz ± 3 dB (19cm/s)
30 Hz ~ 23 kHz ± 3 dB (9.5cm/s)
30 Hz ~ 12 kHz ± 3 dB (4.75cm/s)
Signal-to-noise ratio 55 dB or More (19cm/s)
50 dB or More (9.5cm/s)
50 dB or More (4.75cm/s)
Distortion Factor at 1 kHz and 0 VU 1.5% or Less (19cm/s)
3.0% or Less (9.5cm/s)
3.0% or Less (4.75cm/s)
Crosstalk Mono : 70 dB or less
Stereo : 45 dB or less
Insulation resistance 50M Ω or more
Insulation durability 500 V (1 min. or more)
Erase ratio -70dB or less
Recording (playback) compensation characteristics NAB characteristics
Recording bias frequency 100kHz
Recording head Inline, 4-track, stereo / mono
Glass & Crystal Ferrite Head (15 Ω at 1 kHz)
Playhead Inline, 4-track, stereo / mono
Glass & Crystal Ferrite Head (3,000 Ω at 1 kHz)
Erasing head Inline, 4-track head (330 Ω at 100 khz)
Recording system 4-track, stereo / mono, focus field recording
Fast-forward and rewind time Approximately 75 seconds (370m tape, 50 Hz)
Approximately 60 seconds (370m tape, 60 Hz)
Output Level / Impedance Line : 1.23 V (0 VU) / 100 ohm
Din:0.4V
Headset : 30 mv ~ 40mV/8 Ω
Input Level / Impedance Line : 70mV/150k Ω
Din : 70 mV (high), 7 mV (low) / 150k Ω (high), 16k Ω (low)
Mic : 0.7mV/10k Ω
Monitor system Stereo headphone
Recording time Stereo : 4 hours (370m tape, 4.75cm/s)
Motor For Capstan : Hysteresis Synchronous 3 Speed Motor x1
For Reel : 2 x 6 Pole Outer Rotor Motors
Rotate



Capacitor capacity
Hysteresis synchronous motor :

Outer rotor motor :

Hysteresis synchronous motor :
Outer rotor motor :
3,500/1,500/750rpm(50Hz)
3,600/1,800/900rpm(60Hz)
930rpm(50Hz)
1,120rpm(60Hz)
3 μ F (50 Hz), 2 μ F (60 Hz)
5 μ F (50 Hz), 3.5 μ F (60 Hz)
Maximum use reel Reel 7
Output (GX-365 only) 50W (Music Power)
Semiconductor used Transistor : 46
Silicon Diode : 21 Pieces
Germanium Diode : 11 Pieces
Pwer 100 VAC ~ 240 V, 50Hz/60Hz
Power consumption 70W ~ 200W
External dimensions Width 410x Height 470x Depth 280 mm
Weight 25.5kg
Attachment 1 x #7 Metallic Reel
One sensing tape
Sold Separately Remote Control Unit RC-16