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Getting hum and feedback from speakers help!!!

Discussion in 'Speakers & Subwoofers' started by Paul Pratt, Jan 24, 2004.

  1. Paul Pratt

    Paul Pratt Stunt Coordinator

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    Hey everyone!
    I just got a PT-AE500U Projector and i've been trying to get it hooked up for quite some time now. I've got it mounted and set up and the screen is set and all is good visually.
    One bad thing though. Whenever i hook the projector up to my receiver and out of my subwoofer comes this immense humming like it's getting feedback.
    Then when i hook up my laptop to get audio to the theater it brings out the humming in the speakers too.
    The only thing is that it only happens with the projector hooked up. When i hook in the old 36 inch everything is fine. The same thing happened when i got the free trial of the X1 a couple of months back, but i didn't own it so i just dealt with it.
    I've tried several different solutions. I've tried isolating the cables from one another, tried hooking everything up in different outlets, and the same outlet. I've tried surge strips, surge protectors, and power conditioners, and nothing. I've hooked each component directly into the subwoofer, even the projector, to see if i get feedback and I don't get a damn thing. I've tried crappy cables, and "good" cables, nothing seems to do it.
    I'm lost and really need some advice and help.
    Thanks folks!
     
  2. Robb Roy

    Robb Roy Supporting Actor

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    Paul,

    Have you tried a "cheater" (a three to two prong) plug on either the subwoofer or the projector?

    -Robb
     
  3. Mike_Skeway

    Mike_Skeway Second Unit

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    Could be a ground loop problem. Try the 'cheater' plug as Robb suggested.
     
  4. V JACKSON

    V JACKSON Agent

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    Yep, try a ground lifter plug,on the subwoofer or the projector, you can get them at any hardware store....................
     
  5. ScottCarr

    ScottCarr Second Unit

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    do u have cable tv connected to your system. I chased a ground loop for months. never ever thought to look there.
     
  6. Mike_Skeway

    Mike_Skeway Second Unit

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    Yeah, cable tv is a good ground loop instigator.
     
  7. Paul Pratt

    Paul Pratt Stunt Coordinator

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    That damned cheater worked!!! I can't believe it. I would have never of fixed it. If you guys don't mind me asking can you all tell me what makes that ting work? Is it just eliminating the ground, therefore no ground loop?
     
  8. Robb Roy

    Robb Roy Supporting Actor

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    Exactly right. Doncha' love it when a solution costs less than a buck in this hobby?
     
  9. Mike_Skeway

    Mike_Skeway Second Unit

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    Yup. [​IMG]
     

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