Dual CR 1730

Data

General

  • Manufacturer: Dual
  • Model: CR 1730
  • Years of manufacture: 1979 - 1981
  • Made in: Japan
  • Color: Metallic silver, Metallic brown
  • Remote control: no
  • Power consumption:
  • Dimensions: 440 x 112 x 400 mm (WxHxD).
  • Weight: 9 kg
  • Original price approx.: 698 DM


Connections

  • Number of inputs:
    • Phono (MM): 1.8 mV / 47 kOhm, by switch also 5.0 mV /47 kOhm, DIN and Cinch.

Tape 1 In: 200 mV / 470 kOhm (DIN and Cinch), Tape 2 In: 200 mV / 470 kOhm (Cinch on the rear panel and 6.3 mm jack plug on the front panel) AUX (DIN)

    • Monitor In (Cinch)
  • Number of outputs:
    • 2x Tape Out, Monitor Out
    • Headphones (6.3 mm jack, front)
    • 2 pairs of speakers


Technical Data

Amplifier

  • Continuous power (according to DIN)
    • 8 Ohm:
    • 4 Ohm: 2 x 55 W
  • Music power
    • 8 Ohm:
    • 4 Ohm: 2 x 75 W
  • Total harmonic distortion: 0.08% (2x 35 W, 1 kHz)
  • Attenuation factor: > 20
  • Frequency response:
    • 10 - 30 kHz (DIN 45 500)

10 - 40,000 Hz (± 1.5 dB)

  • External voltage spacing: (DIN, nominal power)
    • Phono: 65 dB

High level: 62 dB

  • Noise voltage spacing:
    • Phono: 80 dB

High level: 90 dB

  • Crosstalk attenuation:
    • between channels: > 50 dB
    • between the inputs: > 65 dB
  • Tone control:
    • Bass: yes, ± 14 dB at 40 Hz

treble: yes, ± 14 dB at 15 kHz

  • Loudness: yes
  • High Filter: yes, - 3 dB at 6.5 kHz (12 dB/octave)
  • Low Filter (Subsonic): yes, - 3 dB at 50 Hz (12 dB/octave)


Tuner

  • Reception: FM, MW, LW.
  • Frequencies:
    • FM: 87.5 - 108 MHz
    • MW: 510 - 1,620 kHz

LW: 150 - 340 kHz

  • Frequency response: 40 Hz - 12.5 kHz
  • Input sensitivity:
    • VHF: 0.8 µV (mono), 25 µV (stereo)

MW: 30 µV LW: 30 µV

  • Distortion factor: 0.2% (mono/stereo)
  • S/N ratio: 60 dB (mono), 62 dB (stereo)
  • Crosstalk attenuation at 1 kHz: 40 dB
  • Channel separation:
  • Selectivity: 65 dB
  • Co-wave selection:
  • Spurious wave selection:
  • IF immunity: 80 dB
  • IF noise immunity: 85 dB
  • AM suppression:
  • Station memory: 5


Special Features

  • FM muting


Remarks


Pictures

  • Image: Dual CR 1730

Dual CR-1730-1.jpg


  • Excerpt from brochure: Dual CR 1730

Dual CR-1730-Prospekt-1.jpg


Reports

Links