Stereo Tape Deck
Up to now in manufacturing recording/playback heads, permalloy has been used for making the core and metallic foil has been used for making the gap.
However, for the model GX-220D Akai has developed a glass and Xtal (crystal) ferrite head.
The core is made of pure crystal ferrite in addition to which the inner circumference of the head shield (including the core and the gap) is mounted and set in glass.
As a result, the head is not only dust free and wear free, but produces a focused field (the magnetic field is concentrated into a narrow oblong radius) permitting recording without the weakening or erasing of the signal by the bias current.
High frequency signals can be recorded and regenerated as original sound without distortion.
Track system: 4-track, 2-channel, stereo/monaural system
Heads: 1 x GX playback, 1 x GX record, 1 x erase
Motor: 2 x reel, 1 x capstan
Reel size: up to 7 inch reel
Tape speeds: 1 7⁄8 3 3⁄4 7 1⁄2 ips
Wow and flutter: 0.08% (7 1⁄2 ips)
Frequency response: 30Hz to 24kHz (7 1⁄2 ips)
Signal to Noise Ratio: 50dB
Total harmonic distortion: 1.5%
Input: 50mV (line), 7mV (DIN), 0.2mV (mic)
Output: 1.23V (line)
Semiconductors: 24 x transistors, 2 x IC, 14 x diodes
Dimensions: 430 x 425 x 230mm
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Reviewed Sep 04th, 2016 by turnitup
Just purchased a GX-220D at an estate sale. Spent the good part of 4+ hours tearing it down, cleaning, lubing and deoxing all of the pots. Just hooked it up, and am amazed by the perfect performance and clarity that I am getting out of it. My guess is that this unit had not been used in 20+ year, but now performs flawlessly. I love the vintage gear, it looks and plays like it just rolled off of the production line. You really have to hand it to the Japaneese engineers of the day, who are all probable in their mid to late 70s and engineered this hardware. It's quite amazing, and will probably play for another 100+ years if maintained. Great job Akai! Wish gear was still made to these standards...
Reviewed Jul 27th, 2014 by gautam banerjee
Very nice deck, stand-by for my home listening system.