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Thread: Help! High pitch ringing noise!

  1. #21
    Constant Bitrate knownchild's Avatar
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    Do you think the PSU being too close to the hard drive and motherboard could cause this issue?
    Never accept STOCK equipment.

  2. #22
    MySQL Error soundman98's Avatar
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    my first impression, is that power supplies should not cause that much noise..

    but after looking at your build log, and realizing that your using the m4, it is possible (did you see the thread on noisy power supplies?)

    but i am a little confused on how your setup came together-- are you still using everything in a in-dash setup, or have you now relocated everything to the glove box, and spread out the components?

    with the way your setup last pictured setup goes together, it should be pretty easy to separate the m4 from the other components to test that theory..

    Quote Originally Posted by kegobeer View Post
    There are a lot of things to consider when it comes to getting rid of induced noise. Location of the equipment, proximity to power wires and equipment, and poor grounds are just a few of them. I eliminated 95% of the noise I got by moving my amp and computer from the shelf above my gas tank in the trunk (right above a very noisy fuel pump) to an amp rack I built and put in the base of the trunk, and by using a distribution block for all of the equipment grounds that connects to a good chasis ground by a 4GA wire (I already had a power distribution block for the equipment). The rest was eliminated by grounding the RCA cables at my USB DAC to the same ground distribution block.

    Moving the computer to a different location, using a different ground, and grounding the RCA cables at the computer are things you can try.
    some really good points. i always prefer to start with checking the power-ground, as that is the one that most commonly causes problems.


    i should also note that grounding the rca cables doesn't always work-- in my install, when i tested it, it made GL noise worse..

  3. #23
    Constant Bitrate knownchild's Avatar
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    Quote Originally Posted by soundman98 View Post
    my first impression, is that power supplies should not cause that much noise..

    but after looking at your build log, and realizing that your using the m4, it is possible (did you see the thread on noisy power supplies?)

    but i am a little confused on how your setup came together-- are you still using everything in a in-dash setup, or have you now relocated everything to the glove box, and spread out the components?

    with the way your setup last pictured setup goes together, it should be pretty easy to separate the m4 from the other components to test that theory..



    some really good points. i always prefer to start with checking the power-ground, as that is the one that most commonly causes problems.


    i should also note that grounding the rca cables doesn't always work-- in my install, when i tested it, it made GL noise worse..
    It is all built in the glovebox but the power supply is within a centimeter of the hard drive and that's what i seem to be hearing in my speaker, i can hear its disks spinning.
    Ill have to fiddle with it, i just don't want to because its kind of a pain in the arse. However i did ground the amp in the same location as the PSU and the noise has been reduced considerably.
    Never accept STOCK equipment.

  4. #24
    Constant Bitrate knownchild's Avatar
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    This is probably the best documentation i have found yet pertaining to audio noise:
    http://www.termpro.com/articles/noise.html
    Last edited by knownchild; 02-25-2011 at 10:43 AM.
    Never accept STOCK equipment.

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