Kenwood KR-4140
Data
General
- Manufacturer: Kenwood
- Model: KR-4140
- Year of manufacture: 1970 - 1972
- Made in: Japan
- Color: Silver, Black, Walnut wood cabinet
- Remote control: No
- Power consumption: 120 W at full output / 20 W without signal
- Dimensions: 425 x 140 x 315 mm
- Weight: 9 kg
- Original price approx.: 300 US-$, 1'100 DM
Connections
- Number of inputs:
- Phono 1/2: 2.5 mV / 50 kOhm
MIC: 1.8 mV / 100 kOhm
- Aux / Tape Play: 150 mV / 100 kOhm
- Main In: 100 mV / 100 kOhm
- Antenna: FM (75 Ohm Unbalanced / 300 Ohm Balanced), AM.
- Number of outputs:
- Tape Rec (RCA / DIN): 150 mV / 30 mV.
- Pre-Out:
- Headphones
- 2 pairs of speakers
Technical Data Tuner Part
- Reception: FM, MW
- Frequencies:
- FM: 88 - 108 MHz
MW: 520 - 1610 kHz
- Frequency response: 20 - 15,000 Hz (± 1.2 dB, FM)
- Input sensitivity:
- FM: 1.8µV
- MW: 15µV
Distortion factor:
- Mono: 0.5 %
Stereo: 0.8
- Signal to noise ratio: 65 dB
- Common mode selection: 2.5 dB
- Channel separation (1 kHz): 35 dB
- Selectivity:
- FM: 65 dB
MW: 25 dB
- Co-wave selection: 70 dB
- Spurious wave selection: 40 dB
- IF attenuation: 70 dB
- IF attenuation:
- AM suppression:
Amplifier Part Specifications
- Continuous power (at distortion)
- 8 Ohm: 2 x 24 W
- 4 Ohm: 2 x 33 W
- Dynamic power
- 8 Ohm: 80 W (IHF)
- 4 Ohm: 95 W (IHF)
- Total harmonic distortion: 0.5 % at full modulation
- Attenuation factor: 50 at 8 Ohm
- Frequency response: 20 - 40000 Hz ± 1.5dB
- Power bandwidth(IHF): 17 - 30000 Hz
- Signal to noise ratio:
- Phono 1/2: 65 dB
- Microphone: 58 dB
- Aux/Tape Play: 75 dB
- Tone control:
- Bass: ± 10 dB at 100 Hz
Treble: ± 10 dB at 10 kHz
- Loudness: + 10 dB / 100 Hz, + 5 dB / 10 kHz
- Low Filter : -7 dB at 100 Hz
- High Filter: -10 dB at 10 kHz
Special Features
- Separable pre- and power amplifier
- Separate mono output
- Microphone inputs L + R
- Kenwood original microphone MC-501 optionally available
- FM muting
- Note: in some countries the unit was originally supplied with metal cover. The walnut wood case was available under the designation SR-66 for example in the USA optionally for 19.95 US-$.
Remarks
- Other models of the same series:
Pictures
- Kenwood KR-4140
- Option: Kenwood original microphone MC-501
Reports
- External report from "Good Old Hifi": [[1]]
- External repair report from "Old Fidelity": [[2]]