Akai X-1800 SD

Data

General

• Manufacturer: Akai
• Model: X-1800 SD
• Type: Combined reel-to-reel tape recorder with built-in amplifier, 8-track unit
• Years of manufacture: 1969 - 1972
• Made in: Japan
• Color: Silver, Case Walnut
• Remote control:
• Power consumption: 60 W
• Dimensions (WxHxD): 378 x 338 x 238 mm
• Weight: 17 kg
• Original price approx.: 1'600 DM

Connections

• Number of inputs:
  • Microphone: 0.5 mV
  • Phono, Tuner: 60 mV
  • DIN: 2 mV
• Number of outputs:
  • Line: 50 mV
  • DIN: 10 mV
  • Headphones:

Coil Tape Specifications

• Max. Coil diameter: 18 cm
• Drive: 1 motor
• Heads: 3
• Tracks: 4
• Tape speeds:
  • 4.75 cm/s
  • 9.5 cm/s
  • 19 cm/s
  • 38 cm/s with adapter
• Slip:
• Synchronous fluctuations:
  • 4.75 cm/s: < 0.2% RMS
  • 9.5 cm/s: < 0.15% RMS
  • 19 cm/s: < 0.12% RMS
• Pitch fluctuations:
• Overall frequency response:
  • 4.75 cm/s: 30Hz - 9kHz ±3 dB
  • 9.5 cm/s: 30Hz - 18kHz ±3 dB

19 cm/s: 30Hz - 23kHz ±3 dB

• Signal-to-noise ratio: > 50 dB
• Signal-to-noise ratio:
• Distortion factor: < 1.5% (1 kHz)
• Equalization: according to NARTB
• Crosstalk attenuation:
• Cancellation attenuation:
• Premagnetization and extinction frequency: 81 kHz
• Rewind time: 150 seconds for 370m band

Technical Specifications 8-Track Tape

• Tape: 8-track
• Tape speed: 9.5 cm/s
• Synchronization fluctuations: < 0.25% RMS (9.5 cm/s)
• Pitch fluctuations:
• Overall frequency response: 50Hz - 17kHz ±3 dB (9.5 cm/s).
• Signal-to-noise ratio: > 45 dB

Amplifier Section Specifications

• Continuous power:
  • 8 Ohm:
  • 4 Ohm:
• Dynamic power:
  • 8 Ohm: 12 Watt (6+6W).
  • 4 Ohm:
• Tone control: Yes
  • Bass:
  • Treble:
• Speaker: L/R

Special Features

• Crossfield audio head system: In the Crossfield audio head system, the so-called bias magnetization of the audio tape is not - as is generally the case - via the recording/playback head, but via a separate audio head (bias head), which is located opposite the aforementioned recording/playback head. This audio head arrangement allows signal modulation over the entire audio frequency spectrum without any interference from bias magnetization as is the case with other audio head systems.
• Reel to 8-track dubbing
• Automatic tape cut-off
• Vertical and horizontal operation possible

• Excerpt from brochure: Akai Crossfield sound head system
  • X-330

Comments

• Other models in the same series:
• Akai 1710 L
• Akai 1710 W
• Akai 4000
• Akai 4000 D
• Akai 4000 DS
• Akai GX-220
• Akai GX-220 D
• Akai GX-280
• Akai GX-280 D
• Akai GX-365
• Akai GX-365 D
• Akai M-10 L/W
• Akai X-150 D
• Akai X-200 D
• Akai X-300
• Akai X-330
• Akai X-330 D
• Akai X-360
• Akai X-360 D
• Akai X-1800 SD
• Akai X-2000 SD
• Akai X-5000 L/W

Pictures

• Excerpt from brochure: Akai X-1800 SD