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Thread: Finally everything works....almost

  1. #1
    Constant Bitrate
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    Post Finally everything works....almost

    I am now done with my install, although I need to hide some wores and do some cosmetic work. Anyway I have one last problem.

    When I play my sound it sounds great, except for a constant humming in the background. It is there with or without the car running. And I don't even have to be playing winamp. If the comp is just on and I turn up the volume I can hear the noise. It is not unbearable, but it is always there in the background, quite when the sound is low, but it seems to rise as the volume increases.

    Thanks in advance for your advice, and I have done some searching on the subject but couldn't decide if others' problems were the same as my own.

  2. #2
    Maximum Bitrate
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    Post

    Sounds like ground loop. Is your case grounded to the chassis? Are you power and audio wires running together side-by-side? If they are it can cause noise. Try doing that, if it doesn't help you can get a ground loop isolator from Radio Shack
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  3. #3
    FLAC LESLIEx317537's Avatar
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    Lightbulb

    Sounds either like a bad ground or your wires are running by a source where they are picking up interference.
    Did you run your audio cables on the opposite side of your power cables?
    Are they good sheilded rca wires your running for audio?
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  4. #4
    FLAC LESLIEx317537's Avatar
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    Cool

    hey, you stole the words right out of my mouth.

    Jinx, you owe me a beer!
    SP13000|M2-ATX|512MB DDR400|2.5" 7200RPM S-ATA|Trans-7"|Slim SL DVD-CDRW|KEH 5.1 DSP|SB L!ve Ext|Gyration PowerMate|BT|WiFi|GPS|WinXP|VoomPC
    GPSing - Digital Speedo
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  5. #5
    Constant Bitrate
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    Post

    Thanks for the suggestions guys. But what do you mean is the case grounded? What would I ground? Right now It sits in my trunk, and the audio runs up the center of my car, while the power lines are run along the doors.

  6. #6
    Maximum Bitrate PoBoy's Avatar
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    Post

    Grounding:

    Take a wire (any guage will do)...run it from a screw on the computer to a metal part on your car. MAKE SURE THERE IS NOT PAINT COVERING THE TWO CONTACT POINTS.

    I just cut a little slit in my carpet where comptuer is...scratched the paint off the metal there...and screwed the wire down which is attached on the other end to my comp.

    You can also waste 15 bucks at radio shack and get a ground loop thingy that will kinda do the trick. But if you make sure that your ground is hitting metal on metal...you will not need a ground loop isolator.
    I'm a ghost...email me if you have any questions on my old setup

    My way outdated website: http://www.poboytech.net

    FYI: I sold my 96 4Runner and bought a 1985

  7. #7
    Maximum Bitrate
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    Post

    Attach a wire to case then attach it to the chassis. I used a female banana plug and attached a 12 guage wire to the power supply (acrylc box, no metal). That way I could run a wire grounded to my chassis with a male banana plug attached, so I could disconnect it easily.

    Case----female plug[ [male plug-----chassis

    If you are using a PC case attach it to the metal of the case.

    [ 02-03-2002: Message edited by: Maveric ]
    http://www.mp3car.com/usersites/Maveric/ M.A.V.I.C. System
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  8. #8
    Retired Admin Aaron Cake's Avatar
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