Akai GX-270D SS

The Akai GX-270D SS is a mid/high-fidelity quadraphonic (4-channel surround sound) reel-to-reel tape deck produced between 1976 and 1980. This model was designed for home use and can serve as a mini 4-track home studio, featuring Akai's renowned quad sync capability.

Core Technical Specifications

• Production Years: 1976–1980

• Track System: 4-track system with both 2-channel (stereo) and 4-channel (quadraphonic) playback

• Surround Sound (Quad): Yes (Quadra Sync feature, mini-studio capability)

• Tape Speeds: 3¾ and 7½ ips (inches per second)

• Maximum Reel Size: 7 inches

• Number of Heads: 4 (full track erase, quarter track 2-channel erase, 4-track playback, 4-channel recording head)

• Head Composition: Permalloy

• Motors: Three motors (1 AC servo direct drive capstan, 2 eddy current reel)

• Frequency Response: 30 Hz–21 kHz ±3 dB (7½ ips); 30 Hz–15 kHz (3¾ ips)

• Wow and Flutter: <0.07% at 7½ ips

• Signal-to-Noise Ratio: 54 dB (measured with peak record level of +6 VU)

• Inputs: Four microphone, four line

• Outputs: Four line, two headphones (RCA and DIN connectors)

• Pitch Control: ±5%

• Rewind Speed: 68 seconds for a 1,200 ft tape at 60 Hz (83 s at 50 Hz)

• Voltage: 110–120V

• Dimensions (W × D × H): 18.3 × 17.3 × 7.5 in (465 × 440 × 191 mm)

• Weight: 39.2 lbs (17.8 kg)

• Transport Control: Full logic solenoid control, compatible with RC-70/RC-17/RC-18 remotes

Features and Highlights

• Quadra Sync: Used as a 4-track home studio for overdubbing and other studio applications, akin to the TEAC A-3340.

• Surround Sound Playback: Supports true quadraphonic tape playback for immersive sound.

• No Auto-Reverse: Playback direction is manual only.

• Sturdy Build: Classic Akai reliability with permalloy heads for long life.

• 5% Pitch Control: Allows fine tuning of playback/recording speed.

• Logic Transport: Feather-touch solenoid logic controls for smooth operation.