• 05-23-2010, 03:53 PM
    VintageTurntable
    Kenwood Stereo Receiver Lacks Power
    It's a KR-4070 & I got 2 huge Speakers 4 way 6 driver,15" Woofers 150 watts & it can't shake the house. Don't know what to do??
  • 05-23-2010, 05:49 PM
    JohnMichael
    Quote:
    Originally Posted by VintageTurntable
    It's a KR-4070 & I got 2 huge Speakers 4 way 6 driver,15" Woofers 150 watts & it can't shake the house. Don't know what to do??


    It is only a 40 watt receiver and if the power supply is not hefty enough you are not going to move a 15" woofer.
  • 05-23-2010, 06:44 PM
    dakatabg
    What is the brand and the exact model of the speakers you are using?
  • 05-23-2010, 07:03 PM
    JohnMichael
    Quote:
    Originally Posted by dakatabg
    What is the brand and the exact model of the speakers you are using?



    Does not matter he needs more power.
  • 05-23-2010, 07:10 PM
    dakatabg
    Quote:
    Originally Posted by JohnMichael
    Does not matter he needs more power.

    I know but I am just curious
  • 05-23-2010, 08:50 PM
    thekid
    VT- It is not always about the power of the amp-efficiency of the speakers can also be a contributing factor. As JM mentioned the receiver is a 40 wpc which would work well for most speakers from that time period. However it sounds like you have some more modern speakers that might be a little power hungry and the 40 wpc is just not enough. You probably need to decide whether you like the receiver or the speakers because it just sounds like they are just a good fit for each other.
  • 05-24-2010, 10:46 AM
    VintageTurntable
    Scott don't know the model. I think it can move a 15" Woofer but i'm not really feeling the vibration at all. I just feel like I might need more power. but it is 40 Watts X 2.
  • 05-24-2010, 11:47 AM
    VintageTurntable
    I'm pretty much disappointed with the majority of the Vintage 1970's Kenwood Stereo Receivers most are only 40 to 80 wpc. All the good ones with 100 WPC or more are hard to find & way to exspensive.
  • 05-24-2010, 11:54 AM
    dakatabg
    Get one Kenwood powered amplifier like the KM series and you will be very satisfied. Most are rated 100W +.
  • 05-24-2010, 12:04 PM
    rob_a
    Quote:
    Originally Posted by VintageTurntable
    I'm pretty much disappointed with the majority of the Vintage 1970's Kenwood Stereo Receivers most are only 40 to 80 wpc. All the good ones with 100 WPC or more are hard to find & way to exspensive.
    It might just might be the combo of speaker and receiver not matching up as well as you hoped. My Dad has a similar Kenwood module he bought in the 70's and is still running it today. He is pushing a set of Optimus mock 2's just fine and they have 15'' woofers. If I remember correctly, those speakers are pretty easy to push.
  • 05-24-2010, 12:11 PM
    markw
    Not all speakers are created equal.
    A large speaker in a comparatively small enclosure is not a good thing.

    While lack of power may actually be an issue here to some degree, a lot of kabuki speakers I heard (and I heard a LOT in the service overseas) were remarkably deficient in real, deep bass for what one would expect from such a large woofer. They were overly heavy in the mid/upper bass (syrupy?) but down in the dungeons, they lacked big time.

    FWIW, Kenwood made some pretty durn good receivers, assuming you use good speakers.
  • 05-24-2010, 12:57 PM
    VintageTurntable
    Will give that a try for sure.
  • 05-24-2010, 02:40 PM
    thekid
    Quote:
    Originally Posted by VintageTurntable
    I'm pretty much disappointed with the majority of the Vintage 1970's Kenwood Stereo Receivers most are only 40 to 80 wpc. All the good ones with 100 WPC or more are hard to find & way to exspensive.
    I will defend Kenwood a bit here and say that the KR series you have there are really just somewhat on the average side. Older KA series silverface such as the 7100,8100 and 9100 will surprise you. My 8100 is only 75 wpc but it will drive just about anything you could throw at it. The KM series Dak mentions is a bit "newer" being a product of the 80's and early 90's but will also power anything if paired with a decent pre-amp.

    As others have mentioned it may not be the source but the speakers. Big boxes and/or big drivers do not equal good bass. If you really want bass I think you need to do some research and find out what is out there and don't be swayed by the speaker/driver size. I have some older gear with only an 8" woofer that would shame many speakers today with drivers twice that size.
  • 06-05-2010, 05:52 PM
    Charlie04SiR
    My KR-9400 & KR-9600 will "Rock the House" for sure, especially if I hook them up to my 380SE, AT-15, or D-9 Cerwin Vegas :D
  • 06-05-2010, 05:55 PM
    Charlie04SiR
    Quote:
    Originally Posted by markw
    A large speaker in a comparatively small enclosure is not a good thing.

    While lack of power may actually be an issue here to some degree, a lot of kabuki speakers I heard (and I heard a LOT in the service overseas) were remarkably deficient in real, deep bass for what one would expect from such a large woofer. They were overly heavy in the mid/upper bass (syrupy?) but down in the dungeons, they lacked big time.

    FWIW, Kenwood made some pretty durn good receivers, assuming you use good speakers.
    Hey Mark, your signature you are missing rule #2 Go back & repeat Rule #1 lol! :D