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Thread: HELP!! Buzzing coming thru speakers..

  1. #1
    Constant Bitrate
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    HELP!! Buzzing coming thru speakers..

    Can someone who's good w/ car stereo offer me some insight please?

    I have my computer's sound card output hooked into my amp and it makes this buzzing noise that's really annoying at low volume levels. If i plug headphones into the computer, no noise. If I run an external cd player into the amp, no noise. If i add a ground loop isolator, it makes things worse. If i change the wires from the amp to the computer, it doesn't help. I have tried 2 differnt stereo to rca adatpers, and 2 sets of rca cables. I have re-routed them in various ways, and I have regrounded the amp elsewhere. HELP!?!

  2. #2
    Low Bitrate
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    Have you grounded the computer case?
    mATX mobo
    2.4 GHz Celeron (prescott)
    512 MB RAM
    80 GB 3.5" HD
    Runnin off an inverter (for now)
    7" Lilliput
    Microsoft (Pharos) USB GPS
    Have yet to pull the trigger on a slim slot load DVD
    STATUS: who knows... I don't

  3. #3
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    are you running power next to signal wires?

    have you made SURE that you have a good ground? have you scraped away all the paint that was there?

    are you using an inverter or a DC-DC psu?
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  4. #4
    Stank Cheese n8scstm's Avatar
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    One last time. Use a ground loop isolator.
    http://www.radioshack.com/product.as...t%5Fid=270-054
    If this is the one that you have already tried then I appolagize but I swear by this one. If you havnt tried this particular one, that would be my next step.
    2.4 celeron
    150 watt OPUS
    micro atx
    xp pro
    tv/radio tuner card
    audigy
    Dual monitor Radeon
    802.11G Mimo
    xm pcr
    dvd
    gps
    8" Lilliput touch screen
    IGuidance
    dual optimas
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    15" screen
    My Truck

  5. #5
    Constant Bitrate
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    The case is grounded. I have tried holding the rca cables from the computer to the amp in the air, that doesn't seem to stop the noise. The battery is in the trunk, so I didn't run a big power wire from the hood. I grounded the computer at the facotry ground for the battery, so I know that's good. I'm running an inverter, but I have one in my other car and I have installed them in lots of cars like this, but never heard this noise before. it's not just a whine, it's a buzzing sound, and it doesn't change w/ rpm's.

  6. #6
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    hrmmm - sound card?

    amp going out?

    does it get louder with the volume being turned up?

    there's so many different things is could be...lol
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  7. #7
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    n8scstm, might want to read a little more throughly next time?

    Quote Originally Posted by amrit50
    If i add a ground loop isolator, it makes things worse.
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  8. #8
    Variable Bitrate
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    Ground your PC audio to your HU audio.

    I'm pretty sure that'll fix your problem.

  9. #9
    Constant Bitrate
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    "Ground your PC audio to your HU audio."

    What does this mean?

    If i must the pc volume the sound doesn't change, nor does changing the volume. The sound is on board on a new MB, and the amp is brand new too.

  10. #10
    Constant Bitrate
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    HU=head unit I don't have a head unit, just a lillput screen.

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