Difference between revisions of "Kenwood KA-907"

 
 
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__NOTOC__
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== Data ==
 +
{{navigation}}
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'''General'''
 +
* Manufacturer: [[Kenwood]]
 +
* Model: KA-907
 +
* Type: Stereo integrated amplifier
 +
* Years of manufacture: 1979 - 1981
 +
* Made in: Japan
 +
* Colour: Silver, variants [[Kenwood KA-9077]] in grey metallic, Trio KA-9900 Japan execution
 +
* Power consumption: 1000 W at full power
 +
* Dimensions (WxHxD): 460 x 161 x 463 mm
 +
* Weight: 25,8 kg
 +
* Original price approx.: 2'798 DM
 +
* New price D-90 handles: 200 DM
  
−
'''KENWOOD HIGH SPEED DC INTEGRATED AMPLIFIER'''
 
  
−
Leistung: 150+150 WPC minimum RMS beide Kanäle betrieben, an 8 Ohm zwischen 20Hz bis 20000Hz mit weniger als 0,01% total  harmonischer Verzerrungen           
+
'''Connections'''
−
               
+
* Number of inputs:
 +
** Input sensitivity:
 +
** Phono 1 MM: 2.5mV, 33 kOhm, 47 kOhm, 100 kOhm, max 230mV RMS (1Khz, 0.01% THD).
 +
** Phono 1 MC: 0.1mV, 100 Ohm, max. 9mV RMS (1Khz, 0.01% THD)
 +
** Phono 2 MM: 2.5mV, 47 kOhm, 47 kOhm, 100 kOhm, max. 230mV RMS (1Khz, 0.01% THD)
 +
** Tuner: 150mV, 50 kOhm
 +
** AUX 1,2: 150mV, 50 kOhm
 +
** Tape Play A, B: 150mV, 50 kOhm
 +
** Main In: 1V / 50kOhm
 +
* Number of Outputs:
 +
** Outputs:
 +
** Tape Rec: 150mV, 180 Ohm
 +
DIN: 30mV / 80 Ohm
 +
** Pre Out: 9V max. / 750 Ohm
 +
** Headphones
 +
** 2 pairs of speakers
  
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Beide Kanäle betrieben:
 
−
                              150+150 Watt an 8Ohm bei 1000Hz
 
−
                              180+180 Watt an 4Ohm bei 1000Hz
 
−
von Audio Test
 
−
atesttierte tatsächliche
 
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Dauerleistung:             
 
−
                            202+202 Watt an 8Ohm
 
−
                            308+308 Watt an 4 Ohm
 
  
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Total harmonische Verzerrung
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'''Technical Data'''
−
(20Hz bis 20000Hz)            
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* Continuous power (at THD)
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** 8 Ohm: 2x 150W (RMS, 20 Hz - 20 kHz, 0.01% THD), 2x 150W (1Khz)
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AUX Eingang bis SPEAKER Ausgang:      
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** 4 Ohm: 2x 180W (1Khz)  
−
                                        0,01% bei Vollaussteuerung an 8Ohm
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* Dynamic power
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                                        0,006% bei halber Aussteuerung an 8Ohm
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** 8 Ohm: 
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Phono Eingang bis SPEAKER Ausgang:    
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** 4 Ohm:
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                                        0,01% bei Vollaussteuerung mit VOLUME bei -20dB
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* Total harmonic distortion:
−
                                       
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** Phono: 0.01% (rated power, volume at -20dB).
−
Intermodulations Verzerrung     
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** Phono IMD: 0.0045% (nominal power, 8 Ohm)
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(60Hz: 7kHz=4:1)                       
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High Level: 0.01% (nominal power, 20Hz - 20kHz, 8 Ohm)
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                                        0,0045% bei Vollaussteuerung an 8Ohm
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** High Level: 0.006% (1/2 nominal power, 20Hz - 20Khz, 8 Ohm)
 +
* Attenuation Factor: 100 (DC - 20Khz, 8 Ohm)
 +
* Frequency Response:  
 +
** DC - 400 kHz (+0 / -3dB, DC ON).
 +
** 1Hz - 400kHz (+0 / -3dB, DC OFF)
 +
** 20Hz - 20kHz (RIAA, ±0.2dB)
 +
* Power bandwidth: 5Hz - 100Khz (0.03% THD), -70dB (DIN 45500)
 +
* Signal-to-noise ratio:
 +
** Phono 1, 2 MM: 90dB at 2.5mV
 +
** Phono 1, 2 MM: 96dB at 5,0mV
 +
** Phono 1, 2 MM: 102dB at 10mV
 +
** Phono 2 MC: 70dB at 0,1mV
 +
** Phono 2 MC: 76dB at 0.2mV
 +
** Phono 2 MC: 105dB at 150mV
 +
** Tuner, AUX, Tape, A, B: 105dB for 150mV input
 +
* Rise Time: 0.5 to 0.8 µS 
 +
* Slew Rate: ± 230V/µS
 +
* Tone Control
 +
** Bass:
 +
*** 150Hz : ± 7.5dB at 75Hz, ±10dB at 25Hz.
 +
*** 400Hz : ± 7.5dB at 155Hz, ±10dB at 50Hz.
 +
Treble:
 +
*** 3Khz : ± 7.5dB at 10kHz, ±10dB at 20kHz
 +
*** 6Khz : ± 7.5dB at 20kHz, ±10dB at 40kHz
 +
Loudness : +3 / +6 / +9dB at 30Hz or 100Hz
 +
* High Filter : 12dB / octave above 8Khz
 +
* Subsonic Filter : 6dB / octave below 18Hz
  
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Dämpfungsfaktor:                       
 
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                                        100. DC~20000Hz bei 8Ohm
 
−
 
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Rise Time:                             
 
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                                        0,5 bis 0,8 µS   
 
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Slew Rate:                             
 
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                                        +-230V/µS
 
−
Leistungsbandbreite:                   
 
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                                        5Hz bis100kHz bei 0,003% T.H.D.
 
  
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Frequenzgang:     
+
'''Special Features'''
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DC COUPLED an:                         
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* Pre- / power stage separable
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                                        DC bis 100kHz bei 0,003 T.H.D.
 
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DC COUPLED aus:                       
 
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                                        1Hz bis 400kHz +0dB, -3dB
 
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Speakerimpedanz:                       
 
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                                        4-16 Ohm
 
  
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Eingansempfindlichkeit/Impedanz:
 
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Power IN:                         
 
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                                    1V/50kOhm
 
−
Phono1 (MM):                       
 
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                                    2,5mV/33kOhm, 47kOhm und 100 kOhm
 
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Phono2 (MM):                       
 
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                                    2,5mV/47kOhm
 
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Phono1 (MC):                       
 
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                                    0,1mV/100Ohm
 
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Tuner, AUX,Tape A, B:             
 
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                                    150mV/50kOhm
 
  
−
Signal to Noise Ratio (IHF, A): 
+
== Remarks ==
−
Phono1&2 (MM):                      
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* Other models in the same series:
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                                    90dB für 2,5 mV Eingang
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** [[Kenwood KA-305]]
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                                    96dB für 5mV Eingang
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** [[Kenwood KA-501]]
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                                    102 für 10 mV Eingang
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** [[Kenwood KA-601]]
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Phono1 (MC):                       
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** [[Kenwood KA-701]]
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                                    70dB für 0,1 mV Eingang 
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** [[Kenwood KA-801]]
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                                    76dB fürfür 0,2 mV Eingang
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** [[Kenwood KA-907]]
−
Tuner, AUX, Tape, A, B:             
 
−
                                    105dB für 150mV Eingang
 
  
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Maximaler Einganslevel: 
 
  
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für Phono1&2 (MM):                 
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* [[Corresponding Tuner]]
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                                    230mV (RMS), T.H.D. 0,01% bei 1000Hz
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** [[Kenwood KT-917]]
−
für Phono1 (MC):                   
 
−
                                    9mV (RMS), T.H.D. 0,01% bei 1000Hz
 
  
−
Ausgangslevel Impedanz:     
 
  
−
Tape REC (pin):                     
+
== Pictures ==
−
                                    150mV/180Ohm
+
* Extract from brochure: Kenwood KA-907
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        (DIN):                     30mV/80kOhm
+
[[File:Kenwood KA-907-Prospekt-1.jpg]]
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PRE OUT (Maximum):                  
 
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                                    9V/750Ohm 
 
  
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Frequenzgang für Phono:           
 
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                                          RIAA standart curve +-2dB                         
 
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                                          (20Hz bis 20000Hz)
 
−
 
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Klangregelung:               
 
  
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Bass:                               
+
== Reviews ==
−
                                    +-10dB Crossover Freq. 400Hz und 150Hz
+
* Audio Test attested real 202+202 watts at 8ohms and 308+308 watts at 4 ohms.
−
Treble:                             
 
−
                                    +-10dB Crossover Freq. 3kHz und 6 kHz
 
  
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Loudness (gehörrichtige Lautstärkeanhebung) 
+
* Review by "Hifi Studio": [https://web.archive.org/web/20170604110040/http://www.hifi-studio.de/hifi-klassiker/kenwood/KA-907_KT-917/KA-907_KT-917.htm]
−
(at-50dB VOLUME Level)
 
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                                            +3dB, +6dB, +9dB bei 30Hz oder 100Hz
 
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Subsonic Filter:              
 
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                              18Hz, 6dB/oct
 
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High Filter:                  
 
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                              8kHz, 12dB/oct
 
  
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GENERELL
+
* Report from "Mackers": [http://www.mackern.de/index.php/2008/12/19/kenwood-ka-907/]
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Leistungsaufnahme:      
+
 
−
                              1000 Watt
+
* Report from "Good Old Hifi": [http://www.good-old-hifi.de/kenwood_ka-907/]
−
A,C Outlet:                  
+
 
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                              Switched 2, Unswitched 2
+
 
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Größe:                       
+
* Fascination Kenwood KA-907!
−
                              BxHxT= 460x161x463mm
+
* An amp. with unadulterated sound, absolute noise-free, stereo channel separation, the minimum distortion up to the highest volumes, no matter what speakers. The 907 shows how good speakers are. If the sound is bad, it is because of the speakers! An amp should reproduce signals without distortion, preferably with a lot of power, and the 907 does that brilliantly! The quality is unique! Especially for phono lovers! Developed by Trio-Kenwood!
−
Gewicht:                     
+
 
−
                              25,8Kg (56,9lbs)
+
 
−
alle Waagen auf denen ich
+
== Links ==
−
Ihn hatte zeigten aber:     
+
* External link to website "Hifi Archive": [http://www.hifi-archiv.info/Kenwood/1980-1/07.jpg]
−
                              28,3Kg
+
 
−
+
* External link on website "The Vintage Knob": [http://www.thevintageknob.org/kenwood-KA-907.html]
−
Das obere Gerät zeigt den passenden Tuner KT-917 die Daten zu DIesem Folgen noch in der entsprechenden Rubrik.
+
 
−
http://img264.imageshack.us/img264/3295/75726681th0.jpg
+
 
 +
[[Category:Integrated Amplifier]]

Latest revision as of 02:02, 1 January 2021

Data[edit]

General

  • Manufacturer: Kenwood
  • Model: KA-907
  • Type: Stereo integrated amplifier
  • Years of manufacture: 1979 - 1981
  • Made in: Japan
  • Colour: Silver, variants Kenwood KA-9077 in grey metallic, Trio KA-9900 Japan execution
  • Power consumption: 1000 W at full power
  • Dimensions (WxHxD): 460 x 161 x 463 mm
  • Weight: 25,8 kg
  • Original price approx.: 2'798 DM
  • New price D-90 handles: 200 DM


Connections

  • Number of inputs:
    • Input sensitivity:
    • Phono 1 MM: 2.5mV, 33 kOhm, 47 kOhm, 100 kOhm, max 230mV RMS (1Khz, 0.01% THD).
    • Phono 1 MC: 0.1mV, 100 Ohm, max. 9mV RMS (1Khz, 0.01% THD)
    • Phono 2 MM: 2.5mV, 47 kOhm, 47 kOhm, 100 kOhm, max. 230mV RMS (1Khz, 0.01% THD)
    • Tuner: 150mV, 50 kOhm
    • AUX 1,2: 150mV, 50 kOhm
    • Tape Play A, B: 150mV, 50 kOhm
    • Main In: 1V / 50kOhm
  • Number of Outputs:
    • Outputs:
    • Tape Rec: 150mV, 180 Ohm

DIN: 30mV / 80 Ohm

    • Pre Out: 9V max. / 750 Ohm
    • Headphones
    • 2 pairs of speakers


Technical Data

  • Continuous power (at THD)
    • 8 Ohm: 2x 150W (RMS, 20 Hz - 20 kHz, 0.01% THD), 2x 150W (1Khz)
    • 4 Ohm: 2x 180W (1Khz)
  • Dynamic power
    • 8 Ohm:
    • 4 Ohm:
  • Total harmonic distortion:
    • Phono: 0.01% (rated power, volume at -20dB).
    • Phono IMD: 0.0045% (nominal power, 8 Ohm)

High Level: 0.01% (nominal power, 20Hz - 20kHz, 8 Ohm)

    • High Level: 0.006% (1/2 nominal power, 20Hz - 20Khz, 8 Ohm)
  • Attenuation Factor: 100 (DC - 20Khz, 8 Ohm)
  • Frequency Response:
    • DC - 400 kHz (+0 / -3dB, DC ON).
    • 1Hz - 400kHz (+0 / -3dB, DC OFF)
    • 20Hz - 20kHz (RIAA, ±0.2dB)
  • Power bandwidth: 5Hz - 100Khz (0.03% THD), -70dB (DIN 45500)
  • Signal-to-noise ratio:
    • Phono 1, 2 MM: 90dB at 2.5mV
    • Phono 1, 2 MM: 96dB at 5,0mV
    • Phono 1, 2 MM: 102dB at 10mV
    • Phono 2 MC: 70dB at 0,1mV
    • Phono 2 MC: 76dB at 0.2mV
    • Phono 2 MC: 105dB at 150mV
    • Tuner, AUX, Tape, A, B: 105dB for 150mV input
  • Rise Time: 0.5 to 0.8 µS
  • Slew Rate: ± 230V/µS
  • Tone Control
    • Bass:
      • 150Hz : ± 7.5dB at 75Hz, ±10dB at 25Hz.
      • 400Hz : ± 7.5dB at 155Hz, ±10dB at 50Hz.

Treble:

      • 3Khz : ± 7.5dB at 10kHz, ±10dB at 20kHz
      • 6Khz : ± 7.5dB at 20kHz, ±10dB at 40kHz

Loudness : +3 / +6 / +9dB at 30Hz or 100Hz

  • High Filter : 12dB / octave above 8Khz
  • Subsonic Filter : 6dB / octave below 18Hz


Special Features

  • Pre- / power stage separable


Remarks[edit]



Pictures[edit]

  • Extract from brochure: Kenwood KA-907

Kenwood KA-907-Prospekt-1.jpg


Reviews[edit]

  • Audio Test attested real 202+202 watts at 8ohms and 308+308 watts at 4 ohms.
  • Review by "Hifi Studio": [1]
  • Report from "Mackers": [2]
  • Report from "Good Old Hifi": [3]


  • Fascination Kenwood KA-907!
  • An amp. with unadulterated sound, absolute noise-free, stereo channel separation, the minimum distortion up to the highest volumes, no matter what speakers. The 907 shows how good speakers are. If the sound is bad, it is because of the speakers! An amp should reproduce signals without distortion, preferably with a lot of power, and the 907 does that brilliantly! The quality is unique! Especially for phono lovers! Developed by Trio-Kenwood!


Links[edit]

  • External link to website "Hifi Archive": [4]
  • External link on website "The Vintage Knob": [5]
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