help with hum

Discussion in 'Archived Threads 2001-2004' started by Philip_G, Jun 4, 2001.

  1. Philip_G

    Philip_G Producer

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    I've got a shiva, running of an adire 250 watt plate amp, and have been moving the sub around for better sound and noticed it's picked up a nasty hum, I've already got the amp plugged into a cheater plug, the hum goes away for the most part if I unplug the cable from the receiver, or if I turn the reciever off as well.
    any ideas? do I have a problem with the reciever? it's not the best cable (about a 20 foot power acoustic) but the hum goes away when the deck is off so I don't think that's it.
    IT'S DRIVING ME CRAZY [​IMG]
     
  2. Grant B

    Grant B Producer

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    If you have a Tv on, try turning that off and see if the hum goes away.
    Radiation from a CRT and induce noise into cables...tryng running it away from the TV as much as possible
    Grant
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  3. Philip_G

    Philip_G Producer

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    WEIRD
    it's a projection TV, and I think the sub was whackin out the convergence (couldn't find any other possability) so I moved it to a corner away from the tv to try and fix that.
    got the hum to go away by switching the sub cable around, end from the sub into the deck and the end from the deck into the sub?? never woulda thought.
     
  4. Julian Data

    Julian Data Second Unit

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    Have you tried using another outlet for the sub amp?
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  5. Philip_G

    Philip_G Producer

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    Yup, tried it in every outlet in the room (there's at least 2 different circuits in the room) and it didn't help [​IMG]
     
  6. Julian Data

    Julian Data Second Unit

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    How do you have the amp connected to the receiver? Speaker or line level?
    If it's the latter, is your cable properly shielded?
    Have you tried this.. connecting the receiver to another outlet and keep the amp connected to where you originally had it?
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  7. Philip_G

    Philip_G Producer

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    it's connected with a line level, 20 foot power acoustic cable, not the best cable, but not the worst by any means.
    Can't really move the reciever, but I think I'll get a cheater plug and try that, I know there's a nasty ground loop in this place.
     

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