Teac A-7400 RX

Data[edit]

General

  • Manufacturer: Teac
  • Model: A-7400 RX
  • Type: Stereo Master Reel Tape with DBX
  • Years of manufacture: 1975 - 1978
  • Made in: Japan
  • Color: Silver / Black, side panels wood
  • Remote control: yes, cable remote control RC-170
  • Power consumption: 90 W
  • Dimensions (WxHxD):
    • Drive unit: 470 x 455 x 300 mm
    • Electronic unit: 470 x 205 x 310 mm
  • Weight:
    • Drive unit: 27.5 kg
    • Electronic unit: 12,5 kg
  • New price approx.: 398'000 Yen (Japan, 1975), 6'000 DM
  • New prices accessories:
    • Cable remote control RC-170: 10,500 Yen, 160 DM


Connections

  • Inputs:
    • Microphone: 0.25 mV (0.6-10 K-ohms) -.
    • Line: 100 mV (50 K-Ohm)
  • Outputs:
    • DIN: 0.3 V 10 K-Ohm) -.
    • Line: 0.3 V (10 K-Ohm)
    • Headphones: 0.05 V (8 Ohm)


Technical Data

  • 2-channel, stereo tape deck
  • Max. Reel diameter: 26.5 cm
  • Drive type: 2 eddy current winding motors and 1 hysteresis synchronous sound motor
  • Head equipment: 1 recording head, 1 playback head, 1 erasing head Permaflux
  • Tracks: 2 / 4
  • Tape speeds: 19 cm/s, 38 cm/s
  • Overall frequency response:
    • at 19 cm/sec: 25 - 28'000 Hz
    • at 38 cm/sec: 25 - 30'000 Hz
  • Crosstalk attenuation at 1 kHz in stereo mode: 50 dB
  • Signal-to-noise ratio: 60 dB (1 kHz)

DBX On: 100 dB

  • Dynamic range DBX: 110 dB (1 kHz)
  • Coincident fluctuations:
    • at 19 cm/sec: ± 0.05 %
    • at 38 cm/sec: ± 0.04 %
  • Max. Deviation of the average velocity:
    • at 38 cm/sec: ± 1 %.
  • Extinguishing damping:
    • at 38 cm/sec: 68 dB
  • Premagnetization and extinction frequency: 100 kHz
  • DC at fast quenching


Special Features

  • Stereo 2 / 4 track master reel tape with DBX
  • Drive unit and electronic unit separated
  • 2 VU meters, frequency linear
  • Rear tape control
  • Drive logic
  • Remote control of all functions available as accessories
  • Switch VU-Meter (High/Normal)
  • Equalization and premagnetization
  • Output adjustable left/right separately


Remarks[edit]


Pictures[edit]

  • Extract from brochure: Teac A-7400 RX

Teac A-7400 RX-1975.jpg


Reports[edit]

Links[edit]