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Thread: What is causing this noise from my sub? (Clip included)

  1. #11
    Raw Wave tbird2340's Avatar
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    Quote Originally Posted by OldSpark View Post
    FYI - that voltmeter fluctuates a lot, and gets over 14.4V etc.
    What is it monitoring?

    If it's ignition or dash, make sure your ground connections (chassis-engine-battery-) are properly connected and sized - especially if the alternator is sensing battery voltage!
    Huh?
    Current Vehicle: 2007 Dodge Nitro

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  2. #12
    Raw Wave
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    Sorry - it is an AFM. It looked like a typical bling voltmeter....

  3. #13
    MySQL Error soundman98's Avatar
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    Quote Originally Posted by OldSpark View Post
    Sorry - it is an AFM. It looked like a typical bling voltmeter....
    ? i re-watched the video a couple of times-- it is a black screen with the noise he is referring to-- i don't see anything..


    i agree on the other points, it sounds almost like either a ground loop, or incorrect crossover setting..

  4. #14
    Raw Wave tbird2340's Avatar
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    I don't have a mic hooked up and even with all levels muted it still happens.

    The AMP is a Kicker zx350.2. I don't have any separate crossover.
    Current Vehicle: 2007 Dodge Nitro

    Second Vehicle: Sold it :( 2005 Dodge Ram 1500 Quad Cab

    First Vehicle: 2003 Ford Ranger

  5. #15
    MySQL Error soundman98's Avatar
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    ok, what are the crossover settings set to on the amp?

  6. #16
    Raw Wave tbird2340's Avatar
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    Before I go look. What *should* they be so I can change them if incorrect. Thanks
    Current Vehicle: 2007 Dodge Nitro

    Second Vehicle: Sold it :( 2005 Dodge Ram 1500 Quad Cab

    First Vehicle: 2003 Ford Ranger

  7. #17
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    Most subs should not see anything above 100 Hz, maybe 120 Hz
    CAR: 2007 G35 Sport Coupe 5AT
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  8. #18
    Raw Wave tbird2340's Avatar
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    Crossover is set to LO and 110 Hz.. It was making the noise even without Windows being loaded.. Also, no cell phones were in my truck either (I've heard those causing sound issues before).. Should I turn the frequency down?
    Current Vehicle: 2007 Dodge Nitro

    Second Vehicle: Sold it :( 2005 Dodge Ram 1500 Quad Cab

    First Vehicle: 2003 Ford Ranger

  9. #19
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    Try removing the inputs from the crossover alltogether, Is the noise still there?

    Try bypassing the crossover, go straight from you head unit or computer into the sub, with no other signal. In other words dont play music or anything, just see if the same noise is there.

    That noise is well above 110 Hz so should not make it through the crossover.
    CAR: 2007 G35 Sport Coupe 5AT
    HARDWARE: Dell D630 w/ dock, internal 80G HD, internal 320G HD, Verizon Wireless Card, iBlue GM-2 GPS w/iGuidance, OBDPros w/DashCommand, Visteon HD Radio w/ Home Made Cable, Current Version of RR w/ DFX Skin. My Install.

  10. #20
    MySQL Error soundman98's Avatar
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    110 should be low enough, though you can try to turn it down to 80, or even its lowest setting to check if it willl remove the noise..

    did you happen to do anything to the amp recently?

    i had a issue similar to this a couple of months ago when i was trouble shooting my own ground loop issues, and tried "lifting the ground" by applying power to the negative rca input briefly-- it resulted in messing up the amp-- so it output a constant tone..

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