Akai GX 230D

The Akai GX-230D is a mid- to high-fidelity, solid-state reel-to-reel tape deck produced between 1976 and 1980, known for its robust mechanics, glass and crystal ferrite GX heads, and advanced auto-reverse capability. It was aimed at demanding home audio enthusiasts and semi-professional users.

Technical Overview

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

• Heads: 3 heads total
  GX Forward Playback
  GX Reverse Playback
  Combination GX Record/Erase head

• Motors: Three-motor system
  2 × eddy current motors (outer rotor) for reel drive
  1 × AC servo motor for direct capstan drive, using advanced pulse detection for improved accuracy and stability

• Tape Speeds: 7½ ips (19 cm/s) and 3¾ ips (9.5 cm/s)

• Maximum Reel Size: Up to 7 inches diameter

• Frequency Response:
  30 Hz to 23 kHz (±3 dB) at 7½ ips
  30 Hz to 19 kHz (±3 dB) at 3¾ ips

• Wow and Flutter:
  0.07% RMS at 7½ ips (some sources cite 0.06%)

• Signal-to-Noise Ratio:
  Better than 60 dB (measured with peak recording level of +6 VU)

• Erase Ratio:
  Better than 70 dB

• Total Harmonic Distortion:
  Less than 1% (1 kHz, 0 VU)

• Inputs:
  Line: 70 mV
  Mic: 0.3 mV
  DIN: 0.5 V

• Outputs:
  Line: 0.775 V
  Headphones: available
  Output power: 7W x 7W min. at 8Ω (100Hz to 20kHz, ≤3% THD)

• Rewind/Fast Forward:
  75 sec for 1,200 ft tape

• Power Requirements: AC 120V, 60Hz (USA/Canada); AC 220V, 50Hz (CEE); 100V to 240V switchable on other models

• Power Consumption: 90W

• Dimensions: 440(W) x 395(H) x 205(D) mm

• Weight: 15.2 kg

• Other Features:
  Digital tape counter, automatic/manual reverse playback, tape selector switch for bias/equalization adjustment, expanded VU meters, dual tape/source monitoring, line/mic mixing
  Glass and crystal ferrite GX heads for long life, superior high-frequency response, and minimal wear

Summary

The Akai GX-230D is prized for its stable and precise tape handling, auto-reverse play and record (triggered by sensing foil or manual controls), low wow and flutter, and advanced GX heads providing durability and accurate sound reproduction. It is highly respected among vintage audio enthusiasts for its durability, fidelity, and user-friendly operation.