Category:Mid High Fidelity (most Japanese recorders fall into this category)
Country of Manufacture:Japan
Release dates:1973 - 1978
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Dimension: 375 x 435 x 248 mm - 14.8 x 17.1 x 9.8 inch
Head Composition: Permalloy
Head Configuration: Stereo
# Motors: 1
Voltage(s): 110-120v, 220-240v
Frequency Response: 30Hz - 22kHz 7½ ips +-3dB
Wow and Flutter: 0.12% at 7½
Signal-to-Noise Ratio:50 dB
Sound quality rating:6 / 10
Long-term reliability rating: 7 / 10
Weight: 18.4 kg - 40.5lbs
This was a combination reel to reel/cassette stereo recorder available as either a self-contained unit with internal amps and monitor speaker (GX-1900) or as a deck only (GX-1900D). Two-way transfer was achievable, either from cassette to reel or visa versa. A single hysteresis synchronous 2-speed motor was employed, coupled to a jumbo flywheel maximized tape speed accuracy and minimized wow and flutter. GX heads were used in the cassette recorder but not in the reel to reel section.
A low-noise, silicon transistor record and playback equalizer amplifier ensured optimum eq at both tape speeds and tape lifters were employed on the reel unit during fast wind. Other features included automatic stop and shut-off, large illuminated VU meters and the standard Akai pause/start button coupled to the twin-lever transport controls. The cassette unit utilized push-tab buttons.
Total harmonic distortion: 2%
Input: 50mV (line), 3mV (DIN), 0.5mV (mic)
Output: 1.228V (line)
Distortion: less than 2% (1,000 Hz “0” VU) / Erase ratio: better than 70 dB / Hum and noise: less than 10mV at minimum tone control / Crosstalk: better than 45 dB (stereo), 60dB (mono) / Semi-conductors: 16 transistors, 12 diodes, 2 linear IC’s & 2 power IC’s (GX 1900 only) / Audio output power: 10 watts per channel / Inputs: Microphone: 0.5 mV impedance 5 Kohms Line: 50 mV impedance 200 Kohm DIN: 0.4V / 50 mV (High) 3 Mv (Low) / Outputs: Line: 1.228V (+4 dB using a 25Hz test tone “0” VU) Headphones: 30 mV at 8 ohms Speaker outputs: 10 watts / channel at 8 ohms (GX-1900 only) / Speaker(s): 2 built-in 4″ speakers (GX-1900 only) / Dimensions: 15 x 17.4 x 9.9″ (375 x 435 x 248 mm) with cover / Weight: GX-1900: 45 lbs (20.5 Kg ) GX-1900D: 40.5 lbs (18.4 Kg) / quarter-track stereo