Akai GX-280D-SS (1973–1976)
A discrete 4-channel reel-to-reel tape deck with automatic reverse and GX heads, built for surround stereo recording and playback.
Overview
The Akai GX-280D-SS is a 4-channel tape deck made from 1973 to 1976 for discrete quadraphonic recording and playback. It belongs to Akai's GX-series professional reel-to-reel line. It has a 4-head configuration and a 3-motor drive system. It runs 4-track, 4/2-channel operation on 1/4-inch tape and takes reels up to 7 inches. Akai marketed it as a "Surround Stereo" and "professional 4-channel tape deck" for audiophiles and engineers exploring quadraphonic sound.
Specifications
| Model Rating | 4-channel tape deck |
| Track System | 4-track, 4/2-channel stereo/monaural system |
| Heads | 4-Head, GX Head |
| Motors | 3-Motor |
| Tape speeds | 3 3/4, 7 1/2 ips (9.5 cm/s, 19 cm/s) |
| Equalization | NAB |
| Maximum reel size | up to 7 inch reel |
| Signal-to-noise ratio | 58 dB |
| Total harmonic distortion | 0.8% |
| Input sensitivity | 100mV (line), 10mV (DIN), 0.5mV (mic) |
| Output level | 1.23V (line), 0.4V (DIN) |
| External dimensions | Width 430 x Height 505 x Depth 250 mm |
| Weight | 21.5 kg (47.3 lbs) |
| Original price | ¥199,000 (around 1975), $650 (no year specified) |
Design
The GX-280D-SS uses a direct capstan drive with servo motors. It also has Akai's GX heads, claimed to last 150,000 hours, which is significantly longer than typical steel heads. An auto-repeat circuit gives 4-channel continuous playback, and 2-channel Oatley Verse playback is supported. The deck has automatic reverse and records and reproduces 4 channels on discrete 4-track tape.
Context
The GX-280D-SS belongs to a family of Akai 4-channel tape decks that includes the 202D-SS, 1730D-SS, 1730-SS, and GX-400D-SS. Akai positioned it as a professional-grade machine for surround stereo during the quadraphonic era.
Market
Average sale prices have ranged from $100 to $250, with some units listed as high as $749 in recent years. Common service needs are capacitor replacement, new belts, and oscillator relay repairs. Reel motors and restoration kits are available as spare parts. Some units have been reported with modified or missing connectors after servicing.
Market Value
┌──────────────────────────────────────────────────────────────────────────┐ │ AKAI 280D-SS Aug 2026 │ ├──────────────────────────────────────────────────────────────────────────┤ │ High $372 Latest $26 │ │ Median $34 Trend — │ │ Low $19 Volume ~4/mo │ ├──────────────────────────────────────────────────────────────────────────┤ │ $400 ┤ │ │ │ . │ │ │. │ │ $229 ┤ │ │ │ . . . │ │ │ │ │ │ . │ │ $0 ┤ .. . . . ..│ │ ├─────────────────────────────────────────────────────────────────│ │ vol │▄▄ ▄ ▄ ▄ ▄▄ ▄ ▄ ▄ █ █▄│ │ └─────────────────────────────────────────────────────────────────│ │ 2026-04 2026-06 2026-07│ └──────────────────────────────────────────────────────────────────────────┘
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