Category:Super High Fidelity
Country of Manufacture:Japan
Release dates:1982 - 1986
Original Price: $1400
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 10.5"
Number of heads: 4
Dimension: 17½ x 19 x 10" (440 x 483 x 256mm)
Head Composition: Permalloy, Ferrite/Glass
Head Configuration: Stereo
# Motors: 3
Voltage(s): 110-120v, 220-240v
Frequency Response:( 3dB): 7½ ips: 25Hz to 33kHz
Wow and Flutter:less than 0.03% WRMS at 7½ ips, less than 0.04% WRMS at 3¾ ips
Signal-to-Noise Ratio:better than 65 dB at 7½ ips (dbx OFF)
Sound quality rating:7 / 10
Long-term reliability rating: 8/ 10
Weight: 51 lbs (23.2kg)
The GX-747dbx was the successor to the GX-747 with the addition of a dbx decode-encode system. Also, instead of the LED bar meters, the GX-747dbx
reverted back to more conventional VU meters. This could have been partly due to economy. The 747dbx was intended to replace rather than be a more
deluxe version of the 747 and both dbx and LED display may have pushed the price up too much.
The dbx type I NR widely expanded the dynamic range of the tape. Apart from this and the VU meters, the 747dbx was almost identical to the 747.
Recording input controls had a memory marker ring (like the GX-646) and remote control was available as an optional extra.
Like the GX-747, the GX-747dbx was available in either black or silver finish.
Distortion: less than 0.4% at 7½ ips / Dynamic range: 128 dB (dbx switch: ON, 1 kHz, peak recording level) / Rewind speed: 75 seconds for 1200ft / Inputs: mic: 0.25mV impedance 600 ohms, line: 70mV 100 ohms / Outputs: line. 410 mV. headphone: 1.3 mW / Dimensions: 17.3 x 19.4 x 10″ (440 x 493 x 256mm) / / quarter-track stereo