Announcement

Collapse
No announcement yet.

humming

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • humming

    im running M2 ATX/jetways F4/sony amp.

    when i turn the pc on half way through the boot screen when it says windows is starting.... this slight humming can be herd, i think it coinsides with when windows starts its sound device.

    how can i stop this?

    i notice theres a 0.05v difference between negetive on both sides of the M2 ATX, so the mother board and the amp have slightly different megetives, could this be the prob?? would it fry anything if i grounded negetive out on the PSU and on the car?

    cheers
    Ralph

  • #2
    have you matched your gains on your amps?
    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!

    Comment


    • #3
      Originally posted by RedGTiVR6 View Post
      have you matched your gains on your amps?
      erm, not sure what you mean, i turn the gain up so it sounds bout right, this hum is when it should be silent, so what the opc thinks is silent the amp thinks is a hum...

      Ralph

      Comment


      • #4
        Originally posted by Ralphh85 View Post
        erm, not sure what you mean, i turn the gain up so it sounds bout right, this hum is when it should be silent, so what the opc thinks is silent the amp thinks is a hum...

        Ralph
        do you have any audio lines running in tandem with power lines? Power curent causes feedback...AC current usually causes a pulsing sound out of the speakers....but a DC curent will produce a level hum.

        Comment


        • #5
          Originally posted by Ralphh85 View Post
          erm, not sure what you mean, i turn the gain up so it sounds bout right, this hum is when it should be silent, so what the opc thinks is silent the amp thinks is a hum...

          Ralph

          http://www.350z-tech.com/zwiki/Tutor...plifier_Tuning

          Please tune your amps properly first.
          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!

          Comment


          • #6
            I had this problem with my audio too. Come to find out it was bad pre outs on the cd player. id check that out, it could either be that or like a few have said make sure your audio wires are on a different side of the car as your power wires. You can get nasty engine noise if you cross them.
            Rockford Fosgate 5002 (subs)
            (2) 12" Infinity REF1252
            (2) Pioneer TS-A1681R 6.5
            (2) Pioneer TS-A4670R 4X6
            (2) Polk Audio 2" Tweeters

            Comment


            • #7
              sand the paint

              if you sand the paint of a spot on the car completly and then ground the wire back you should loose all extra ground noise

              Originally posted by Ralphh85 View Post
              im running M2 ATX/jetways F4/sony amp.

              when i turn the pc on half way through the boot screen when it says windows is starting.... this slight humming can be herd, i think it coinsides with when windows starts its sound device.

              how can i stop this?

              i notice theres a 0.05v difference between negetive on both sides of the M2 ATX, so the mother board and the amp have slightly different megetives, could this be the prob?? would it fry anything if i grounded negetive out on the PSU and on the car?

              cheers
              Ralph

              Comment


              • #8
                sand all the paint off the spot where your ground is. and if that doe=nt work. tru=y using a different spot or a bigger ground wire.

                Comment


                • #9
                  88 - why the double posts?

                  and sanding down the paint won't always solve the problem.
                  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!

                  Comment


                  • #10
                    Originally posted by RedGTiVR6 View Post
                    http://www.350z-tech.com/zwiki/Tutor...plifier_Tuning

                    Please tune your amps properly first.
                    i have never ever had this problem before and have had many different set ups in different cars.

                    the negetive of the amp and psu input are both soldered to the main 16mm2 cable which runs from battery in boot to the engine int he front. so a very good earth connection.

                    also the amp is right next to the pc, with only a 1m jack to phono cable connecting them so should be good connection there to?!

                    cheers to thoes trying to help
                    Ralph

                    Comment


                    • #11
                      tuning your amps is crucial. I did not say that it was a ground issue, never mentioned such a thing.

                      If your gains are turned up too high you will experience the exact same issues as you are reporting.

                      Having a pinched wire will cause this problem as well.

                      I'm not sure why your against tuning the gains on your amps?
                      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!

                      Comment


                      • #12
                        Originally posted by RedGTiVR6 View Post
                        tuning your amps is crucial. I did not say that it was a ground issue, never mentioned such a thing.

                        If your gains are turned up too high you will experience the exact same issues as you are reporting.

                        Having a pinched wire will cause this problem as well.

                        I'm not sure why your against tuning the gains on your amps?
                        not against it, very far from it, i read that last night and its pretty much what i do but i have only played music i know as have not had the WAV files there.

                        either way i was only wondering if anyone had had a similar problem, or if anyone had grounded pc power to the amps negetive as i thought that might be the prob.

                        other than the slight humming it sounds very good

                        Ralph

                        Comment


                        • #13
                          so...just a slight humming? how is your draw on the alternator? Think you might be pulling to many amps from it?

                          Now that you mention it...I was having a similar problem when I put in my PC...I originally though it may just be the fact that I'm using a 3.5 head phone jack as the connection because it only happens when I'm listening to WMP....3,5 jacks are not really the best in terms of feedback prevention...

                          Comment

                          Working...
                          X