Amplificator Dual CR 1730

  Amplificator Dual CR 1730: 5 intrari, 4 iesiri, impedanta 4-16 ohmi, 2x50W, 2x75W, culoare argintie, reglaje bass, treble, balance, high/low filter, loudness, radio cu memorii, afisaj, AM/FM, poze reale, made in Germany.

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