Akai
GX-635D
Introduced 1978$995 MSRP
Handsome mid-line Akai with GX heads, three-motor transport and bidirectional playback, a staple of late-1970s hi-fi systems. Typically needs pinch rollers, capacitor work and switch cleaning after four decades.
MSRP
$995
Used market · Very Good
$1,750
+76% vs MSRP
as of Sep 1, 2026MSRP to used market
From $1,500 at launch to $1,750 today.
Specifications
- Heads
- 6 total: 2 GX erase, 2 GX record, 2 GX playback heads
- Motors
- 3: one AC servo direct-drive capstan motor plus two AC eddy-current direct-drive reel motors
- Weight
- 21.0 kg (46.4 lbs)
- Dimensions
- 483 × 440 × 256 mm (19.0 × 17.4 × 10.1 in)
- Speeds
- 3.75/7.5 ips
- Tape speeds
- 3¾ ips and 7½ ips
- Track format
- 4-track (quarter-track) stereo, bidirectional playback
- Wow and flutter
- 0.03% WRMS at 7½ ips; 0.04% WRMS at 3¾ ips
- Max reel size
- 10.5"
- Maximum reel size
- 10.5 inches
- Frequency response
- 30 Hz–27 kHz ±3 dB at 7½ ips; 30 Hz–25 kHz ±3 dB at 3¾ ips
- Track configuration
- 4-track, 2-channel, auto-reverse/bothway recording
- Signal to noise ratio
- Better than 62 dB (DIN 45500)
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