Akai GX-4440D

• Track System: 4-track, 2-channel stereo/monaural system

• Heads: 3 heads — 1 record, 1 playback, 1 erase; GX head technology with durable glass ferrite material

• Motor: Two-speed hysteresis synchronous motor with oil circulation (oil-free motor design)

• Tape Speeds: 9.5 cm/s (3¾ ips) and 19 cm/s (7½ ips) ± 1% speed accuracy

• Maximum Reel Size: 7 inches

• Wow and Flutter: 0.08% WRMS at 19 cm/s speed

• Frequency Response: 30 Hz to 24 kHz ±3 dB (19 cm/s), 30 Hz to 16 kHz ±3 dB (9.5 cm/s)

• Signal-to-Noise Ratio: 60 dB (JIS standard)

• Distortion Factor: 1.0% at 1 kHz, 0 VU

• Erasure Rate: Better than 70 dB

• Recording Bias Frequency: 100 kHz

• Inputs:
  Microphone: 0.5 mV / -64 dB (600 Ω to 10k Ω)
  Line: 70 mV / -21 dB (100k Ω input impedance)
  DIN: 3 mV / 30k Ω

• Outputs:
  Line: 1.23 V (0 VU) / load impedance 20k Ω or more
  DIN: 0.5 V
  Headphone: 8 Ω

• Dimensions:  450 mm (H) x 227 mm (D)418 mm (W) x

• Weight: 15.6 kg

• Power: 100 VAC, 50/60 Hz, 55 W power consumption

• Additional Features:
  Fast forward/rewind time approx. 100 seconds with 370m tape (50 Hz)
  Sound-on-sound recording capability
  Automatic shutoff and tape end stop
  Robust construction typical of mid-1970s professional consumer reel tape decks

• Manufacture Period: Mid-1970s, Japan

The GX-4440D is recognized for durable GX heads, stable precise tape transport, and excellent frequency response, making it a sought after vintage analogue reel deck with professional features in its price class.