Country of Manufacture:Japan
Release dates:1976 - 1980
Speeds: 3 3/4, 7 1/2, 15
Max Reel Size("): 10.5"
Number of heads: 4
Head Composition: Permalloy
Head Configuration: Stereo
Frequency Response:( 3dB): 15 ips: 30Hz to 30kHz (Akai LN tape)
Wow and Flutter:less than 0.04% at 15 ips. 0.055% at 7½ ips
Signal-to-Noise Ratio:better than 58 dB @ +6 VU
Sound quality rating:6 / 10
Long-term reliability rating: 8 / 10
The GX-650D was a high-quality,
almost semi-professional tape deck with 3 speeds (3¾ , 7½ and 15 ips) and a belt driven, dual capstan mechanism giving a totally
The main motor was servo controlled, with both pinch rollers being activated
by their own solenoids. Another solenoid pulled the tape guides with another
releasing the brakes.
Rapid change between tape functions was possible thanks to a ‘Hall’ sensor
near the left reel motor which checked if the left reel table was moving.
If a new function was selected, the sensor would activate immediately
once the brakes had brought the tape to a standstill.
Other features included sound-on-sound and a cueing function.
Erase ratio: 70dB / Inputs: Microphone: 0.3 mV. Line: 80 mV impedance 100 Kohm / Outputs: Line: .775 / 20 Kohm Headphones: 30 mV at 8 ohms / Rewind speed: 120 seconds using a 2400 ft. tape / Dimensions: 20.6 x 17.3 x 10″ (524 x 440 x 258 mm) / Weight: 57.6lbs (26.2 kg) / quarter-track stereo