Akai GX-370D

The Akai GX-370D is a sophisticated 4-track stereo reel-to-reel tape deck from the early to mid-1970s, featuring advanced GX (Glass & Crystal Ferrite) heads and full auto-reverse on both record and playback. It is aimed at demanding home and enthusiast users who require both flexibility and reliability.

• Track System: 4-track, 2-channel stereo (or mono compatible)

• Tape Speeds: 3¾ and 7½ ips (9.5 and 19 cm/s), ±0.5% accuracy

• Reel Capacity: Up to 7" reels

• Heads:
  Three Glass & Crystal Ferrite (GX) heads: two record/erase combo heads (fixed) and one movable playback head
  GX heads offer extreme durability and clarity

• Motors:
  Three motors (direct capstan drive, two outer rotor eddy current reel motors)

• Frequency Response:
  Using low noise tape: 30Hz–25kHz at 7½ ips
  Using regular tape: 30Hz–23kHz at 7½ ips

• Wow and Flutter:
  <0.08% RMS at 7½ ips
  <0.12% RMS at 3¾ ips

• Signal-to-Noise Ratio: Better than 50 dB

• Distortion: Less than 1.5% (1kHz, zero VU)

• Crosstalk: Better than 45 dB (stereo)

• Erase Ratio: Better than 70 dB

• Bias Frequency: 102 kHz

• Auto-Reverse: Yes—on both playback and record, providing seamless bidirectional operation

• Special Features:
  Compute-O-Matic: automatic recording level control
  Direct Function Change system for quick switching between operations
  Auto stop/shut-off at tape end
  Off-tape monitoring during recording
  Tape selector switch for low-noise formulations
  Optional wired remote control
  Built-in mic/line mixing (inputs for microphones and line sources)

• Inputs:
  Microphone (2): 0.3 mV / 4–7kΩ
  Line (2): 60 mV / 50kΩ
  DIN jack: 0.5V, 60 mV (high), 5 mV (low)

• Outputs:
  Line: 1.23V (0 VU) / 100Ω (requires load >20kΩ)
  RCA outputs

• Physical:
  Dimensions: 368 × 371 × 227 mm (14.5 × 14.6 × 8.9 in)
  Weight: 15.4 kg (33.9 lbs)

• Power: 110–120V AC

• Release Years: 1972–1976

• Original Price: $1,495 (early/mid-'70s)