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  1. #1
    AR Newbie Registered Member
    Join Date
    Nov 2005
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    3

    Sub/Amp Constant Hum

    Hi,

    Wasn't sure if i should put this under the PC speakers section cause maybe its a general problem with non-pc speakers aswell, but my problem is this.

    No matter whether the volume is set to 0 or i unplug all the jacks from my pc...my sub/amp hums constantly...

    Its a 5.1 system but not the most expensive...

    The humming is actually the sub vibrating constantly.

    Is this due to some crappy components in the amp? and is there anything i can do to fix it

    Thanks

  2. #2
    Loving This kexodusc's Avatar
    Join Date
    Nov 2003
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    Department of Heuristics and Research on Material Applications
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    9,025
    Is the subwoofer new? And does the plug have a 3 prongs?
    Sounds to me like you've got a case of ground loop. If so, there's nothing wrong with the sub, it's your home wiring.
    Try plugging it into a different outlet (on a different circuit). Or, spend $1 or so and buy one of those 3-prong-to-2-prong adaptor cheater plugs.

    I hope this is the problem because it's the easiest to fix.

  3. #3
    AR Newbie Registered Member
    Join Date
    Nov 2005
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    3
    Thanks kexodusc

    The subwoofer is new (but its a subwoofer/amp in one box).

    Unfortunately the plug has 2 prongs :s.

    I will try to move it to another room in the house and see it that works, but the hum has existed since i bought it.

    Will let you know what happens....

    Thanks again

  4. #4
    The Collector
    Join Date
    Sep 2003
    Location
    Springfield, MA
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    331
    it could be leaking DC, maybe a bad output transistor or filter cap.

  5. #5
    AR Newbie Registered Member
    Join Date
    Nov 2005
    Posts
    3
    Damn, moved it away from all other electronics and into a different plug, but still the same noise...

    pelly3s: "it could be leaking DC, maybe a bad output transistor or filter cap."

    thanks for the help, but not sure what this means? do i need to replace something in the amp? or should i just toss this crap and buy somethnig else?

    Thanks again

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