Three Head Stereo Tape Deck (1976-79)
As is well known, the core of Akai's GX Head is made of crystal ferrite and is mounted and set in glass. The superior magnetic properties of the head material and special processing allowed the formation of a perfectly lineal shallow head gap, an acute head surface angle contour, and focusing of the magnetic field into a sharp oblong radius.
This focused field system eliminates undue equalization, minimizes high frequency loss, and achieves a wider dynamic range.
Further, sound drop-out is eliminated, head to tape contact and signal to noise ratio improved, and the hardness of the head materials provide dust free and wear free characteristics for longer lasting performance. The GX-630D exhibits a clear frequency response range to 25,000 Hz with Akai LN-150-7 tape.
This model employs a 3 motor drive system with a new CPG (centre pole generated) AC Servo Motor for direct capstan drive. The quality of this outstanding motor plus the elimination of rubber belts and flywheels results in the realization of a 0.06% Wow and Flutter factor.
Two eddy current outer rotor motors complete the drive system for completely stable performance and excellent tone quality. Impedance Roller and Tension Levers also add to tape travel stability.
A Reel Size Selector and standard accessory 10-1/2" reel hub adapters facilitate the use of 5, 7, or 10-1/2" reels.
Further, this model features quick tension wherein ideal take up and back tension is applied to the reels at the beginning of tape start for smooth operation regardless of reel size.
Track system: 4-track, 2-channel, stereo/monaural system
Heads: 1 x playback, 1 x record, 1 x erase
Motor: 2 x reel drive, 1 x capstan
Reel size: up to 10.5 inch reel
Tape speeds: 3 3⁄4 7 1⁄2 ips
Wow and flutter: 0.06% (7 1⁄2 ips)
Frequency response: 30Hz to 25kHz (7 1⁄2 ips)
Signal to Noise Ratio: 57dB
Total harmonic distortion: 0.5%
Input: 70mV (line), 2.5mV (DIN), 0.25mV (mic)
Output: 0.775V (line), 30V (DIN)
Semiconductors: 50 x transistors, 57 x diodes
Dimensions: 465 x 440 x 240mm
Accessories: connection cords, reel hub adaptors, empty reel
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Reviewed Dec 01st, 2015 by Kajtsu
I bought mine few years ago. I have always wanted one. Excellent sound. ItÂ´s regrettable that reel to reel tapes are not made today and prices go higher. Mine is DB (dolby) version but dolby is not needed. I donÂ´t use it at all.
Reviewed Mar 05th, 2015 by Cristiano90
This is a simple and great tape recorder. Looks awesome and it is easy to be maintained. By replacing 2SC458 transistors inside with a new ones, will reduce the noise of the amplifier.