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Noise coming through speakers - Help Needed

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  • Noise coming through speakers - Help Needed

    Ok. I've searched but none really helped me.

    My setup is as follows:

    M10000 Onboard Sound > Stereo Jack split into RCA's > RCA's to Connector > Connector to Other Connector > Head Unit AUX In port. I have a PW70A w/ ITPS.

    I'm not sure what "Alternator noise" is or not so I don't know if that is what my problem is. Everything works fine in my setup except the noise. I only get the noise when my HU is in AUX mode. The louder I turn my radio up the louder the noise. The noise doesn't seem to change when I accelerate.

    I have my ITPS hooked into the remote wire of my head unit.

    Please help with some ideas of what I can do. Thanks
    Current Vehicle: 2007 Dodge Nitro

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

    First Vehicle: 2003 Ford Ranger

  • #2
    make sure everything is grounded to the same point in your car. psu/case/mobo/amps.. etc
    '98 Explorer Sport
    http://mp3car.zcentric.com (down atm)
    AMD 800mhz 192megs RAM 60gig hard drive 9 inch widescreen VGA
    80% done

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    • #3
      Really? I have things grounded all over the place. Well not really I guess... I mean how many ground wires are there actually? I don't use amps so there would be:

      1. ITPS (and the PW70A PSU ties into the ITPS ground)
      2. The Lilliput EGG (but I wouldn't think that has anything to do w/ the audio)

      Is that it??

      Thanks for the help!
      Current Vehicle: 2007 Dodge Nitro

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

      First Vehicle: 2003 Ford Ranger

      Comment


      • #4
        ya try grounding your pc case to the same spot as your itps.. if you ground it to your car frame.. if you have too many grounds all over the place you create a ground loop which will create noise.. you can buy a ground loop isolator that sits on your rca lines.. but i'd rather ground correctly then mask the real issue.

        but try a simple ground on your pc case first
        '98 Explorer Sport
        http://mp3car.zcentric.com (down atm)
        AMD 800mhz 192megs RAM 60gig hard drive 9 inch widescreen VGA
        80% done

        Comment


        • #5
          the egg thing has had some problems in the past for noise,,
          CarPuter ProgressO meterO
          [+++++++++] 100%, 1Ghz Epia M,opus 90w, Earthmate GPS, 7 inch lilliput molded into dash, anything i forget?
          visit me on the web at
          http://gozips.uakron.edu/~cmk23/

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          • #6
            My case is made out of plexi. How would I ground that?
            Current Vehicle: 2007 Dodge Nitro

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

            First Vehicle: 2003 Ford Ranger

            Comment


            • #7
              Originally posted by microbionic
              the egg thing has had some problems in the past for noise,,
              Now that you say that... I had noise BEFORE I hardwired my Lilli but now that my Lilli is hardwired (tapped into my radio's ACC wire) I am getting a lot more noise.

              Please help!
              Current Vehicle: 2007 Dodge Nitro

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

              First Vehicle: 2003 Ford Ranger

              Comment


              • #8
                I had a problem with grounding too. I dont have the PC in yet, but just with the stereo and amp.
                just make sure you don't have a ground loop. Ground them in the same spot
                I consider that our present sufferings are not worth comparing with the glory that will be revealed in us.

                www.neoterikos.com

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                • #9
                  Ground WHAT in the same spot though? I don't have a metal case so how would I ground the "case". What other ground wires are there besides the ITPS/PSU?
                  Current Vehicle: 2007 Dodge Nitro

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

                  First Vehicle: 2003 Ford Ranger

                  Comment


                  • #10
                    try grounding your case to the frame of your care.. take a o-ring and connect it to some wire and then put the oring around a casr screw.. tighten the screw then find a spot to screw the other side to your frame
                    '98 Explorer Sport
                    http://mp3car.zcentric.com (down atm)
                    AMD 800mhz 192megs RAM 60gig hard drive 9 inch widescreen VGA
                    80% done

                    Comment


                    • #11
                      ok,, i have found in the last week,, the lilli is where the noise is derived from,,,,mostly

                      one you shoud ground your vga shielding on your cable,, tot he chassis,, that will eliminate nearly all of the alternator noise,, but most likely afterwards still hear a slight bit of it.....casused from the "egg" theres no way around this,,, i tried capacitors,GLI's ect,, then i grounded AFTER the egg,, and crystal clear 8-)
                      throw a moon

                      heuvos vin chevos

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                      • #12
                        OK... A couple things.. With the Carputer totally off and with no power whatsoever going to it I still get the noise. Does that mean that it's NOT the PC?

                        Also, hijinks, do you mean for me to take an O ring and attach it to a MOTHERBOARD screw? Like I said.. I don't have a metal case. Look:





                        PaCMaYNE, isn't that dangerous to not use the egg? Isn't it on there to regulate the power going to it? I don't want to be frying my Lilli.

                        Thanks for the help.
                        Current Vehicle: 2007 Dodge Nitro

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

                        First Vehicle: 2003 Ford Ranger

                        Comment


                        • #13
                          yes it is dangerouse to not use regulated power, use regulated power, just not from the "egg",
                          CarPuter ProgressO meterO
                          [+++++++++] 100%, 1Ghz Epia M,opus 90w, Earthmate GPS, 7 inch lilliput molded into dash, anything i forget?
                          visit me on the web at
                          http://gozips.uakron.edu/~cmk23/

                          Comment


                          • #14
                            Should I hard wire it into the PW70A then?
                            Current Vehicle: 2007 Dodge Nitro

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

                            First Vehicle: 2003 Ford Ranger

                            Comment


                            • #15
                              yeh, run it off your PSU's 12v rail.
                              Mods: 18" Boss rims,Twin custom stainless exhaust,cold air induction.
                              Sound: Pioneer 7400 HU & 6x9's,12" Vibe Sub,600W Kenwood amp.
                              CarPC: MicroATX, Inverter, WinTV, Lilliput 7", USB GPS
                              http://www.no1knows.com/galleries/

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