AKAI GX-636 4-Track Auto-Reverse Stereo Tape Deck — 6 GX Heads, 3-Motor Direct Capstan Drive — Serviced — LED Meter Upgrade

This Unit

Professionally serviced and tested with basic preventive maintenance: new belt, lubrication, and alignment. All functions tested and passed, and the unit is expected to perform as designed for long-term use. This unit has also received an LED upgrade to the VU meter illumination, replacing the original incandescent bulbs — brighter, cooler-running, and effectively permanent going forward.

Cosmetically the deck presents very well. There are light surface scratches, most notably one longer scratch across the upper-center of the faceplate, visible under certain lighting conditions but not visible once a pair of 10.5" reels is mounted. All flaws are clearly documented in the photos — please review them closely, as they're part of the listing. Aside from the noted scratches, the faceplate, meters, reel hubs, and controls all present cleanly. Multi-voltage design (110/120/220/240V), currently configured for US current.

About the GX-636

Produced in the early 1980s as one of the last and most feature-rich machines in Akai's celebrated GX line, the GX-636 is regarded by many enthusiasts as a match — and by some, a favorite — over even the flagship GX-747.

Akai's legendary GX (Glass & Crystal Ferrite) heads in a 6-head configuration — one record and one playback GX head per direction, plus two erase heads — arranged with perfect symmetry to enable full auto-reverse recording and playback both ways. The GX heads are prized for their exceptional wear resistance and stable, accurate tape contact.

Three-motor direct-capstan-drive transport — one AC servo motor driving the capstan directly, plus two eddy-current outer-rotor motors for the supply and take-up reels — for smooth, stable tape handling with negligible wow and flutter.

Feather-touch logic control for the transport, with both-way (bi-directional) recording, real-time counter, pitch control, REC mute with timing, timer-start standby, dual VU meters with over-modulation indicators, independent mic and line inputs, and switchable tape/monitor settings. The 4-track quarter-track format ensures broad compatibility with prerecorded and consumer quarter-track tapes.

The GX-636 handles up to 10.5-inch reels and presents in its wood-sided case with the classic Akai silver faceplate.

Verified Specifications

• Track system: 4-track, 2-channel stereo/mono, auto-reverse (both-way record & playback)
• Heads: 6 total — 2 × GX record, 2 × GX playback, 2 × erase
• Motors: 3 — 1 × AC servo direct-drive capstan, 2 × eddy-current outer-rotor reel motors
• Tape speeds: 7½ IPS (19 cm/s) and 3¾ IPS (9.5 cm/s)
• Reel capacity: up to 10.5-inch reels
• Frequency response: 30 Hz–27 kHz (7½ IPS); 30 Hz–20 kHz (3¾ IPS)
• Wow & flutter: <0.03% WRMS (7½ IPS); <0.04% WRMS (3¾ IPS)
• Signal-to-noise ratio: better than 65 dB
• THD: 0.4% (1 kHz, 0 VU)
• Inputs: Mic 0.25 mV, Line 70 mV (100 kΩ), DIN 2 mV (10 kΩ)
• Outputs: Line 0.775V (20 kΩ), DIN 0.3V, Headphones 100 mV (8 Ω)
• Rewind speed: approx. 75 seconds for 1200 ft tape
• Remote: compatible with Akai RC-19
• Power: Multi-voltage 110/120/220/240V, 50/60Hz, 70W
• Dimensions: 440 × 483 × 256 mm
• Weight: approx. 21 kg (46 lbs)
• Years produced: early 1980s, successor to the GX-635D in Akai's GX lineup

Shipping

Securely packed for safe delivery worldwide. Local pickup also welcome. Quoted international shipping rate is to Australia, the farthest destination from my US location — please inquire for a quote to your specific international address. This is a heavy, delicate, and valuable machine and will be fully insured.