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Got some humming/buzzing noise out of stock system

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  • Got some humming/buzzing noise out of stock system

    Hey, I have a 03 TL and I installed one of those Blitzsafe Adapters which basically gives me a AUX input into the stock HU.

    Well anyway, I hooked it all up and then I plug in the PC, Stereo mini to Y cable RCA. There is a lot of humming and buzzing noise. I did a search and several people said it is a bad ground or use a Ground Loop Isolator. From what I understand the Ground Loop Isolator does not eliminate the noise, just cut it down. When I threw my laptop in there, it did the same thing but once I removed the power cord that connected it to the inverter that I had the noise stopped. The inverter could be on but as long as it is not powering the item I have it does not make that noise.

    Next I tried a PS2 and powered it from an extension cord from inside the house and it would still make that humming/buzzing noise. It is pretty loud and is driving me insane. If I use the Tape Cassette adapter to the laptop or PC it works just fine, no noise at all.

    What are my solutions or options? Thanks a lot guys!

  • #2
    ^^bump^^ anyone please?

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    • #3
      Does this adapter get power?
      Georgia Area Meet Photos

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      • #4
        Does it make noise when the aux input is not selected and the radio is on?? I have an inverter setup and whenever mine is plugged in it makes noise thru the system, even makes noise when im not on aux mode. I have two inverters one coleman 400watt and a tripplight 140 watt. The tripplite does not make any noise whereas the coleman has alternator whine and regular interferance..
        CarComputer Status: New Car & Broken (Motherboard Fried)
        Owen JH | My Linux Blog | The Tech Fellows

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        • #5
          The AUX IN adapter does not have a external power, it taps off the back off the headunit. When the AUX input is not selected it is all cool, no buzz or humm. Only when the AUX IN and an item is connected that is powered by the inverter.

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          • #6
            How do you have the inverter wired?
            Georgia Area Meet Photos

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            • #7
              Originally posted by Bxscig
              Hey, I have a 03 TL and I installed one of those Blitzsafe Adapters which basically gives me a AUX input into the stock HU.

              Where did you buy your Blitzsafe? I want to get one and am close to you. I was wondering if you bought it locally.

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              • #8
                Originally posted by Bxscig
                When I threw my laptop in there, it did the same thing but once I removed the power cord that connected it to the inverter that I had the noise stopped.
                You just removed the ground loop.

                Originally posted by Bxscig
                Next I tried a PS2 and powered it from an extension cord from inside the house and it would still make that humming/buzzing noise.
                Did you have the PS2 plugged into a screen at the same time? Does the noise go away if you disconnect the PS2 from everything but the audio feed and the main feed from the house?

                Originally posted by Bxscig
                If I use the Tape Cassette adapter to the laptop or PC it works just fine, no noise at all.
                Tape adapters are magnetically coupled. No ground connection, therefore no ground loop.
                Old Systems retired due to new car
                New system at design/prototype stage on BeagleBoard.

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                • #9
                  Originally posted by falconey
                  How do you have the inverter wired?
                  Hardwired to the car battery and grounded to the car frame.

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                  • #10
                    Did you have the PS2 plugged into a screen at the same time? Does the noise go away if you disconnect the PS2 from everything but the audio feed and the main feed from the house?
                    The PS2 was not plugged into the screen. The noise DOES goes away when I disconnect everything but the audio but since there is no power going to the PS2 there is no noise.

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                    • #11
                      Based on your answers it seems to me that your grounding issue is with the inverter. Make sure the ground point you are using is in fact all metal including the bolt. Make sure you're using a good connector for that ground wire and lastly make sure that area is very clean and scraped to the point that it's paint free.
                      Georgia Area Meet Photos

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                      • #12
                        I think some brands of inverters make more then others. Is everything grounded to the same point??
                        CarComputer Status: New Car & Broken (Motherboard Fried)
                        Owen JH | My Linux Blog | The Tech Fellows

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                        • #13
                          Originally posted by falconey
                          Based on your answers it seems to me that your grounding issue is with the inverter. Make sure the ground point you are using is in fact all metal including the bolt. Make sure you're using a good connector for that ground wire and lastly make sure that area is very clean and scraped to the point that it's paint free.
                          Execpt that when the PS2 is run from the house mains, it still buzzes. Ie, the inverter wasn't being used and the problem existed then.
                          Old Systems retired due to new car
                          New system at design/prototype stage on BeagleBoard.

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                          • #14
                            Originally posted by Jove
                            Where did you buy your Blitzsafe? I want to get one and am close to you. I was wondering if you bought it locally.
                            I actually ordered it online, I remember a place in Brooklyn that sells it but from what I recall it was a little more expensive that ordering online. If you are interested, I'll look up the information.

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                            • #15
                              Originally posted by falconey
                              Based on your answers it seems to me that your grounding issue is with the inverter. Make sure the ground point you are using is in fact all metal including the bolt. Make sure you're using a good connector for that ground wire and lastly make sure that area is very clean and scraped to the point that it's paint free.
                              Yup, I had scraped it off and I still got it while powering it from the house via an extension cord w/o the inverter on.

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