Kenwood KR-7400

Data

General

  • Manufacturer: Kenwood
  • Model: KR-7400
  • Years of manufacture: 1974 - 1976
  • Made in: Japan
  • Color: silver
  • Remote control: no
  • Power consumption:
  • Dimensions: 480 x 151 x 344 mm (WxHxD).
  • Weight: 14 kg
  • Original price approx.: 540 US-$, 2'358 DM


Connections

  • Number of inputs:
    • 2x Phono MM (Cinch): 2.5 mV / 50 kOhm

2x Tape In (Cinch/DIN): 150 mV / 80 kOhm

    • AUX (Cinch): 150 mV / 80 kOhm
    • 4 Channel In
    • Microphone: 2,5 mV / 50 kOhm
    • Antenna FM (75/300 Ohm), AM
  • Number of outputs:
    • 2x Tape Out (Cinch/DIN): 150 mV / 100 Ohm (Cinch); 30 mV / 80 kOhm (DIN)
    • 4 Channel Out

FM Quadradial

    • Headphones (6.3 mm jack, front)
    • 3 Loudspeaker Pairs


Technical Specifications

Amplifier

  • Continuous power

8 Ohm: 2x 63 W (20-20,000 Hz) 4 Ohm: 2x 75 W (1 kHz)

  • Dynamic power
    • 8 Ohm: 208 W
    • 4 Ohm: 290 W
  • Total harmonic distortion: 0.3% (at nominal power)
  • Attenuation factor: 50 (8 Ohm)
  • Frequency response:
    • Preamplifier: 10 - 40,000 Hz (±1 dB).
    • Power bandwidth: 5 - 35,000 Hz
  • Signal-to-noise ratio:
    • Phono MM: 70 dB
    • AUX, Tape: 90 dB
    • Microphone: 65 dB
  • Stereo channel separation:
  • Tone control:
    • Bass: ±10 dB at 100 Hz
    • Mid: ±10 dB at 800 Hz

Treble: ±10 dB at 10 kHz

  • Loudness: +8/+5 dB (100 Hz/10 kHz)
  • High Filter: -10 dB at 10 kHz
  • Low Filter (Subsonic): -8 dB at 100 Hz
  • Mute: FM Muting


Tuner

  • Reception: FM, MW
  • Frequencies:
    • FM: 87.5 - 108 MHz

MW: 525 - 1,605 kHz

  • Frequency response: 20 - 15,000 Hz (+0.5/-1.5 dB, FM)
  • Input sensitivity:
    • FM: 1.7 µV (IHF)

MW: 15 µV Distortion factor:

    • FM: 0.3% (mono), 0.5% (stereo).
  • Signal-to-noise ratio:
    • FM: 70 dB (stereo)

MW: 45 dB

  • Channel separation:
    • FM: 40 dB (at 1 kHz).
  • Selectivity:
    • FM: 80 dB
    • MW: 35 dB
  • Equal wave selection:
    • FM: 1.3 dB
  • Spurious wave selection:
    • FM: 100 dB
  • Image frequency attenuation:
    • FM: 90 dB
    • MW: 70 dB

IF attenuation:

    • FM: 100 dB
    • MW: 70 dB
  • AM suppression: 90 dB


Special Features

  • Connection for 4-channel adapter
  • FM Quadradial output


Remarks


Pictures

  • Image: Kenwood KR-7400

Datei:Kenwood KR-7400-1.jpg


  • Excerpt from brochure: Kenwood KR-7400

Datei:Kenwood KR-7400-Prospekt-2.jpg


Reports

Links