Akai GX 220

The Akai GX-220 is a 1970s solid-state reel-to-reel tape deck designed for both consumer and semi-professional use, known for its reliable mechanics and good audio performance.

Technical Overview

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

• Heads: Three heads consisting of:
  1 GX playback head
  1 GX record head
  1 erase head
  These heads are made from Akai’s unique Glass and X'tal Ferrite material for durability and high-frequency accuracy.

• Motors:
  One 4/8 pole hysteresis synchronous capstan motor for stable tape transport.
  Two 6-pole eddy-current outer rotor reel motors.

• Tape Speeds: Three speeds — 7½, 3¾, and 1⅞ ips.

• Reel Size: Up to 7 inches diameter.

• Frequency Response:
  7½ ips: 30 Hz to 25 kHz (±3 dB)
  3¾ ips: 30 Hz to 20 kHz (±3 dB)
  1⅞ ips: 30 Hz to 10 kHz (±3 dB)

• Wow and Flutter: Less than 0.08% RMS at 7½ ips.

• Signal-to-Noise Ratio: Approximately 50 dB.

• Total Harmonic Distortion: Around 1.5%.

• Inputs:
  Line input: 50 mV (line), 5 mV (DIN), 0.2 mV (mic) with impedance 100 kΩ (line) and 2.2 kΩ (mic).

• Outputs:
  Line output: 1.23 V at 0 VU
  Headphone output: 150 mV / 8 Ω

• Additional Features:
  Auto-reverse playback (play only model) allowing continuous playback without manually flipping tape.
  Digital 4-digit tape counter for tape position tracking.
  Tape type selector for bias and equalization adjustment.

• Power Requirements: Models with 110-120 V or 220-240 V options at 50/60 Hz.

• Dimensions: Approximately 430 mm (W) x 425 mm (H) x 230 mm (D).

• Weight: Around 18-20 kg.

• Special Notes: The GX-220 has a unique Glass and X'tal Ferrite head design that focuses the magnetic field for improved high-frequency response and wear resistance.

Summary

The Akai GX-220 is a versatile and well-constructed reel tape deck offering solid analog performance with a wide frequency response, stable tape transport, and convenient features like auto-reverse and digital tape counter. Its distinctive heads and solid-state electronics contribute to clear, detailed playback and recording quality, making it a popular choice among home users and semi-professionals in the 1970s. It holds up well compared to other mid-tier decks of its era, balancing usability, build quality, and sound fidelity.