Akai GX-1900

• Track system: 4-track, 2-channel stereo/monaural.

• Heads: 1 combined record/playback head and 1 erase head, both permalloy.

• Motors: Single hysteresis synchronous 2-speed motor with a jumbo flywheel for tape speed accuracy.

• Tape speeds: 3¾ and 7½ inches per second.

• Maximum reel size: Up to 7 inches.

• Frequency response: 30 Hz to 22 kHz at 7½ ips.

• Wow and flutter: 0.12% at 7½ ips.

• Signal-to-noise ratio: 50 dB.

• Total harmonic distortion: Approximately 2%.

• Crosstalk: 45 dB.

• Inputs: 50 mV line, 3 mV DIN, 0.5 mV mic.

• Outputs: 1.228 V line output.

• Audio output power: 10 W per channel at 8 ohms (for GX-1900 model with built-in amps and speakers).

• Speakers: 2 built-in 4" speakers (GX-1900 model only).

• Dimensions: 375 mm (W) x 435 mm (H) x 248 mm (D).

• Weight: Approximately 20.5 kg.

• Additional features: Combination reel-to-reel and cassette stereo recorder allowing two-way transfer between media; large illuminated VU meters; auto stop and shut off; pause/start buttons; tape lifters for winding; volume and tone controls for recording and playback.

• Manufacture period: 1973-1978 in Japan.

• Market position: Mid-high fidelity consumer audio component with versatility for reel and cassette playback/recording.

This model was notable for combined reel and cassette recording/playback functionality, practical user controls, and reasonable audio fidelity for its era.