Akai GX-747DBX

• Track system: Auto reverse, 4-track, 2-channel stereo system.

• Heads: 6 heads total — 2 x GX record heads, 2 x GX playback heads, and 2 erase heads made of Permalloy, Ferrite/Glass for superior sound fidelity and durability.

• Motors: 3 motors — 2 reel drive motors and 1 direct drive AC servo capstan motor (Center Pole Generated technology).

• Maximum reel size: 10.5 inches.

• Tape speeds: 3¾ and 7½ inches per second.

• Wow and flutter: Less than 0.03% WRMS at 7½ ips, less than 0.04% WRMS at 3¾ ips.

• Frequency response: 25 Hz to 33 kHz at 7½ ips.

• Signal-to-noise ratio: Better than 65 dB at 7½ ips (DBX off).

• Total harmonic distortion: Less than 0.4%.

• Distortion with DBX on: Improved dynamic range to 128 dB (1 kHz, peak recording level).

• Inputs: Mic 0.25 mV / 600 ohms, Line 70 mV / 100 ohms.

• Outputs: Line 410 mV, headphone 1.3 mW.

• Dimensions: 440 x 493 x 256 mm (17.3 x 19.4 x 10 inches).

• Weight: 23.2 kg (51 lbs).

• Features:
  DBX Type I noise reduction system for expanded dynamic range.
  Auto-reverse with both-way recording.
  Pitch control with ±6% speed variation.
  Timer start and bias adjustment.
  Auto mute function.
  Digital real-time tape counter.
  Memory marker rings on recording input controls.
  Available in black and silver finishes.

• Production years: 1982-1986.

• Market position: Considered a professional consumer-level deck with advanced features, excellent audio fidelity, and durable construction.

The GX-747 DBX improved upon the original GX-747 by adding the dbx noise reduction system, significantly enhancing dynamic range and sound quality while retaining robust tape transport and precise mechanics.