Akai X-1810D

The Akai X-1810D reel to reel tape deck is a versatile stereo/monaural recording device from the early 1970s. 

• Track System: 4-track, 2-channel stereo/monaural system with cross-field bias head

• Reel Size: Supports 5 or 7 inch reels

• Tape Speeds: 1⅞, 3¾, and 7½ IPS

• Heads:
  1 record/playback head
  1 erase head
  1 bias head with cross-field technology

• Motors:
  2 reel drive motors
  1 capstan motor

• Frequency Response:
  30 Hz to 22 kHz at 7½ IPS

• Wow & Flutter: 0.08% at 7½ IPS

• Signal to Noise Ratio: 50 dB

• Total Harmonic Distortion: 2%

• Crosstalk: 45 dB

• Inputs: Line (60 mV), DIN (20 mV), Microphone (0.5 mV)

• Outputs: Line and DIN, both 1.23 V

• Semiconductors: 17 transistors, 15 diodes

• Power: Uses two 6-pole eddy current motors

• Dimensions: Approx. 435 x 450 x 240 mm

• Weight: Around 20 kg

• Manufacture Period: 1974-1976, made in Japan

Additional features include automatic reverse playback, variable speed operation, and internal built-in 8-watt amplifier with two internal speakers for monitoring. This combination makes it suited for professional and high-end home studio use, famous for its cross-field bias system that enhances high-frequency response.