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

• Other models in the same series:
  • Kenwood KR-1400
  • Kenwood KR-2400
  • Kenwood KR-3400
  • Kenwood KR-4400
  • Kenwood KR-5400
  • Kenwood KR-6400
  • Kenwood KR-7400
  • Kenwood KR-9400

Pictures

• Image: Kenwood KR-7400

• Excerpt from brochure: Kenwood KR-7400