Akai X-1800SD

The Akai X-1800SD reel to reel tape deck is a multi-format machine combining a 4-track stereo reel-to-reel recorder and an 8-track cartridge recorder, produced in the early 1970s. 

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

• Tape Speeds: 1⅞, 3¾, 7½, and 15 inches per second (with adapter)

• Motor: 2-speed induction motor

• Frequency Response: 30 Hz to 23 kHz (±3 dB) at 7½ IPS

• Wow and Flutter: ≤0.12% at 7½ IPS

• Signal-to-Noise Ratio: 50 dB or better (reel); 45 dB or better (cartridge)

• Total Harmonic Distortion: About 2%

• Inputs: Microphone 0.5 mV, Line 60 mV

• Output Power: 6 watts RMS (2 x 4" speakers)

• Heads: 3 heads including crossfield bias head for improved high-frequency response

• Dimensions: Approx. 378 x 338 x 238 mm

• Weight: Around 17 kg

• Features:
  Crossfield bias recording system by Akai
  Reel to cartridge dubbing
  Built-in amplifier and speakers for monitoring
  Tape counter and remote control capability
  Supports both vertical and horizontal operation

• Power: AC 110-240 V selectable in multiple steps for worldwide usability

This model was known for its versatility in handling reel and cartridge formats with excellent playback and recording fidelity, making it a favorite for home audio enthusiasts and semi-professional users.