Kenwood KA-4000

Data

General

• Manufacturer: Kenwood
• Model: KA-4000
• Years of manufacture: 1968 - 1971
• Made in: Japan
• Color: Silver, wood side panels
• Type: Amplifier
• Power consumption: 180 W at full output, 13 W without signal
• Dimensions (WxHxD): 408 x 134 x 280 mm
• Weight: 8 Kg
• Original price approx.: 49800 Yen (Japan, 1968), 800 DM

Connections

• Inputs:
  • Input sensitivity:
  • Phono 1 MM: 2 mV, 50 kOhm
  • Phono 2 MM: 2 mV, 50 kOhm
  • Microphone: 2 mV, 100 kOhm
  • Tuner: 200mV, 100 kOhm
  • AUX: 200mV, 100 kOhm
  • Tape Play HD: 2.3 mV, 100 kOhm
  • Tape Play: 200mV, 100 kOhm
    • Tape DIN:
  • Main In: 100 mV, 300 kOhm
• Outputs:
  • Tape Rec:
    • DIN:
  • Pre-Out:
  • Headphones:
  • Connectors for 2 pairs of speakers

Technical Data

• Continuous power (at THD)
  • 8 Ohm: 2x32 W (RMS, 20Hz...20Khz, 0.05% THD), 2x 40W (8 Ohm, 1Khz)
  • 4 Ohm: 2x53 W
• Dynamic power
  • 8 Ohm: 100 W IHF
  • 4 Ohm: 120 W IHF
• Total harmonic distortion: 0.5% THD at rated power from 20 - 20000 Hz
• Attenuation factor: 56 at 8 ohms
• Frequency response:
• Power Amplifier Only: 18 - 50000 Hz, ± 1 dB
• High Level Input: 20 - 50000 Hz, ± 1 dB
• Power bandwidth: 13 - 30000 Hz
• Signal-to-noise ratio:
  • Phono 1: 65 dB

Phono 2: 65 dB

• • Microphone: 67 dB

Tape HD: 63 dB

• • Tuner: 77 dB
  • AUX: 77 dB
  • Tape Play: 77 dB
• Tone control

Bass: ± 10 dB at 100 Hz Treble: ± 10 dB at 10 Khz

• Loudness: + 6 dB at 100 Hz, + 2 dB at 10 kHz
• High Filter: 12dB/oct. at 8kHz
• Low Filter: 12dB/oct. at 80Hz

Muting: 0 dB, - 20 dB

Special Features

• Pre- and power amplifier separable
• Mono / Stereo switch
• Mono center channel output

Remarks

• Other models in the same series:
  • Kenwood KA-2600:
    • KA-2600
  • Kenwood KA-4000:
    • KA-4000
  • Kenwood KA-6000:
    • KA-6000

• Predecessor model:
  • Predecessor model

• Successor model:
  • Kenwood KA-5002:
    • KA-5002

• Corresponding tuners:
  • Kenwood KT-5000
    • KT-5000
  • Kenwood KT-7000
    • KT-7000

• [[Kenwood recommended:
  • Kenwood KF-8011 denoiser
    • KF-8011
  • Kenwood KC-6060 oscilloscope
    • KC-6060
  • Kenwood KC-6060 A oscilloscope (successor model available from 1971 onwards)
    • KC-6060 A

• The units were sold outside Japan under the "brand name" Kenwood. In Japan and partly in other markets the company name Trio was used. Renaming to Kenwood Corporation did not occur until 1986 (source Wikipedia).

Pictures

• Picture: Kenwood KA-4000

• Picture: Kenwood KA-4000 backside

• Excerpt from brochure: Kenwood Combi KA-4000 / KT-7000

Links

• External link: Audio Heritage, Japan website: [1]