Difference between revisions of "Kenwood KA-907"
 
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'''KENWOOD HIGH SPEED DC INTEGRATED AMPLIFIER'''  
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__NOTOC__
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== Data ==
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{{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
  
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'''Leistung: 150+150 WPC minimum RMS beide Kanäle betrieben, an 8 Ohm zwischen 20Hz bis 20000Hz mit weniger als 0,01% total  harmonischer Verzerrungen           
 
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Beide Kanäle betrieben:  
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'''Connections'''
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                              150+150 Watt an 8Ohm bei 1000Hz
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* Number of inputs:
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                              180+180 Watt an 4Ohm bei 1000Hz
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** Input sensitivity:
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von Audio Test
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** Phono 1 MM: 2.5mV, 33 kOhm, 47 kOhm, 100 kOhm, max 230mV RMS (1Khz, 0.01% THD).
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atesttierte tatsächliche
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** Phono 1 MC: 0.1mV, 100 Ohm, max. 9mV RMS (1Khz, 0.01% THD)
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Dauerleistung:            
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** Phono 2 MM: 2.5mV, 47 kOhm, 47 kOhm, 100 kOhm, max. 230mV RMS (1Khz, 0.01% THD)
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                            202+202 Watt an 8Ohm
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** Tuner: 150mV, 50 kOhm
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                            308+308 Watt an 4 Ohm
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** 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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Total harmonische Verzerrung
 
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(20Hz bis 20000Hz)             
 
−
           
 
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AUX Eingang bis SPEAKER Ausgang:       
 
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                                        0,01% bei Vollaussteuerung an 8Ohm
 
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                                        0,006% bei halber Aussteuerung an 8Ohm
 
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Phono Eingang bis SPEAKER Ausgang:     
 
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                                        0,01% bei Vollaussteuerung mit VOLUME bei -20dB
 
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Intermodulations Verzerrung     
 
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(60Hz: 7kHz=4:1)                       
 
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                                        0,0045% bei Vollaussteuerung an 8Ohm
 
  
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Dämpfungsfaktor:                      
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'''Technical Data'''
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                                        100. DC~20000Hz bei 8Ohm
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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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Rise Time:                            
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** 4 Ohm: 2x 180W (1Khz)
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                                        0,5 bis 0,8 µS    
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* Dynamic power
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Slew Rate:                            
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** 8 Ohm: 
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                                        +-230V/µS
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** 4 Ohm:
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Leistungsbandbreite:                  
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* Total harmonic distortion:
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                                        5Hz bis100kHz bei 0,003% T.H.D.
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** Phono: 0.01% (rated power, volume at -20dB).
 +
** Phono IMD: 0.0045% (nominal power, 8 Ohm)
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High Level: 0.01% (nominal power, 20Hz - 20kHz, 8 Ohm)
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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).  
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** 1Hz - 400kHz (+0 / -3dB, DC OFF)
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** 20Hz - 20kHz (RIAA, ±0.2dB)
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* Power bandwidth: 5Hz - 100Khz (0.03% THD), -70dB (DIN 45500)
 +
* Signal-to-noise ratio:
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** Phono 1, 2 MM: 90dB at 2.5mV
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** Phono 1, 2 MM: 96dB at 5,0mV
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** Phono 1, 2 MM: 102dB at 10mV
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** Phono 2 MC: 70dB at 0,1mV
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** Phono 2 MC: 76dB at 0.2mV
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** Phono 2 MC: 105dB at 150mV
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** Tuner, AUX, Tape, A, B: 105dB for 150mV input
 +
* Rise Time: 0.5 to 0.8 µS  
 +
* Slew Rate: ± 230V/µS
 +
* Tone Control
 +
** Bass:
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*** 150Hz : ± 7.5dB at 75Hz, ±10dB at 25Hz.
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*** 400Hz : ± 7.5dB at 155Hz, ±10dB at 50Hz.
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Treble:
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*** 3Khz : ± 7.5dB at 10kHz, ±10dB at 20kHz
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*** 6Khz : ± 7.5dB at 20kHz, ±10dB at 40kHz
 +
Loudness : +3 / +6 / +9dB at 30Hz or 100Hz
 +
* High Filter : 12dB / octave above 8Khz
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* Subsonic Filter : 6dB / octave below 18Hz
  
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Frequenzgang:     
 
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DC COUPLED an:                         
 
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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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'''Special Features'''
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Power IN:                         
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* Pre- / power stage separable
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                                    1V/50kOhm
 
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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
 
  
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Signal to Noise Ratio (IHF, A): 
 
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Phono1&2 (MM):                     
 
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                                    90dB für 2,5 mV Eingang
 
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                                    96dB für 5mV Eingang
 
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                                    102 für 10 mV Eingang
 
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Phono1 (MC):                       
 
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                                    70dB für 0,1 mV Eingang 
 
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                                    76dB fürfür 0,2 mV Eingang
 
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Tuner, AUX, Tape, A, B:             
 
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                                    105dB für 150mV Eingang
 
  
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Maximaler Einganslevel:  
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== Remarks ==
 +
* Other models in the same series:
 +
** [[Kenwood KA-305]]
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** [[Kenwood KA-501]]
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** [[Kenwood KA-601]]
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** [[Kenwood KA-701]]
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** [[Kenwood KA-801]]
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** [[Kenwood KA-907]]
  
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für Phono1&2 (MM):                 
 
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                                    230mV (RMS), T.H.D. 0,01% bei 1000Hz
 
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für Phono1 (MC):                   
 
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                                    9mV (RMS), T.H.D. 0,01% bei 1000Hz
 
  
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Ausgangslevel Impedanz:     
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* [[Corresponding Tuner]]
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** [[Kenwood KT-917]]
  
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Tape REC (pin):                     
 
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                                    150mV/180Ohm
 
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        (DIN):                      30mV/80kOhm
 
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PRE OUT (Maximum):                 
 
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                                    9V/750Ohm 
 
  
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Frequenzgang für Phono:            
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== Pictures ==
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                                          RIAA standart curve +-2dB                         
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* Extract from brochure: Kenwood KA-907
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                                          (20Hz bis 20000Hz)
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[[File:Kenwood KA-907-Prospekt-1.jpg]]
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Klangregelung:              
 
  
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Bass:                               
 
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                                    +-10dB Crossover Freq. 400Hz und 150Hz
 
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Treble:                             
 
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                                    +-10dB Crossover Freq. 3kHz und 6 kHz
 
  
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Loudness (gehörrichtige Lautstärkeanhebung) 
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== Reviews ==
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(at-50dB VOLUME Level)
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* Audio Test attested real 202+202 watts at 8ohms and 308+308 watts at 4 ohms.
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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
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* 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]
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Leistungsaufnahme:      
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                              1000 Watt
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* Report from "Mackers": [http://www.mackern.de/index.php/2008/12/19/kenwood-ka-907/]
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A,C Outlet:                  
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                              Switched 2, Unswitched 2
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* Report from "Good Old Hifi": [http://www.good-old-hifi.de/kenwood_ka-907/]
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Größe:                      
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                              BxHxT= 460x161x463mm
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Gewicht:                     
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* Fascination Kenwood KA-907!
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                              25,8Kg (56,9lbs)
+
* 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!
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alle Waagen auf denen ich
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Ihn hatte zeigten aber:     
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                              28,3Kg
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== Links ==
−
+
* External link to website "Hifi Archive": [http://www.hifi-archiv.info/Kenwood/1980-1/07.jpg]
−
Das obere Gerät repräsentiert den passenden Tuner KT-917 die Daten zu Diesem Folgen noch in der entsprechenden Rubrik.
+
 
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http://img264.imageshack.us/img264/3295/75726681th0.jpg
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* External link on website "The Vintage Knob": [http://www.thevintageknob.org/kenwood-KA-907.html]
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'''
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 +
 
 +
[[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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