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  • Engine noise Soluion?

    I have searched the threads and i can't find somthing that answers my question. I have a dlink usb radio hooked up in my car connected to my car antenna. The sound quality is good and better then i thought it would be. The issue i am having is that i can hear my RPM from the Line-in. I know its the line in because when i mute the Line-in when playing an mp3 i dont hear it.... Anyone who has ever installed stereo in cars will know how annoying that whining noise is.. What would be the best way to insulate/shield that thin wire going to the Line-in? Woudl this solve the problem youthink? Or Do you think that the noise is coming from the USB cable? Any thoughts on a resolution?

    Thanks for any replies.....

  • #2
    Originally posted by (6)
    I have searched the threads and i can't find somthing that answers my question. I have a dlink usb radio hooked up in my car connected to my car antenna. The sound quality is good and better then i thought it would be. The issue i am having is that i can hear my RPM from the Line-in. I know its the line in because when i mute the Line-in when playing an mp3 i dont hear it.... Anyone who has ever installed stereo in cars will know how annoying that whining noise is.. What would be the best way to insulate/shield that thin wire going to the Line-in? Woudl this solve the problem youthink? Or Do you think that the noise is coming from the USB cable? Any thoughts on a resolution?

    Thanks for any replies.....
    Is the line-in cable running near anything? Is the USB d-link powered of a USB hub (which is powered from something grounded in a different place in the car)?
    Ford Focus MP3 : www.stevieg.org/carpc Blog Updated 29 January 2009!
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    • #3
      I'll go along with the grounding questions...

      do you have like 30 different grounds for everything you have installed or did you try to keep the number of grounds minimal?
      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!

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      • #4
        Originally posted by stevieg
        Is the line-in cable running near anything? Is the USB d-link powered of a USB hub (which is powered from something grounded in a different place in the car)?

        I hace created a distribution block for my grounds so they are all at the same spot. The only ground that is not on that block is for my LCD...

        And yes the dlink is powered off of a hub.. A powered hub if that runs off my inverer which is also grounded off the block...

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        • #5
          Pull that Cat 5 network cable you have laying around somewhere and make a stereo cable out of it.
          Basically buy a stereo plug (PC end) and 2 RCA plug (HU end) and solder together. That may help with "engine whine". Other than that don't run it next to hot wire.
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          • #6
            is your ground to teh car an actual ground? have you cleaned off the paint around the contact points, etc? I mean a SOLID ground?
            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!

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            • #7
              Originally posted by Red GTi VR6
              is your ground to the car an actual ground? have you cleaned off the paint around the contact points, etc? I mean a SOLID ground?

              The ground is a solid ground connection. And the oinly whine i am getting when the RPM increses is from the Line-in.

              I will try the cat 5 idea and see if that helps aswell...

              Any other suggestion while i try this????

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              • #8
                where are your gains set at on your amps? I would try turning them down, if they are at or near maximum you will run into this....

                it really sounds like a ground loop issue, with can be a biotch to trouble shoot
                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!

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                • #9
                  in my experience in the past, whine when the RPMs increases has come from interference on the audio cable. (i.e. bein too close to a power cable.)
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