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Thread: extra buzz, audio/power connections

  1. #11
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    Bugbyte's Avatar
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    If you have the power adaptor for it, use an extension cord and plug the laptop into a wall outlet, start the car and try it out that way.

    Many people have had success with ground loop isolators. I've only seen a very few complain about it degrading the audio, so your chances are good that it will work without making the audio muddy.
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  2. #12
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    Many people have had success with ground loop isolators. I've only seen a very few complain about it degrading the audio, so your chances are good that it will work without making the audio muddy.
    Whew! I was hoping for a good answer. Downside of the inverter problem, I won't have an extension cord for probably the next week (ugh snow, work, outside storage sheds, and daylight for only the hours I'm at work ). So, I'll wait a week, try it on the weekend when I actually don't have work, and will update this thread on the results.

  3. #13
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    Quote Originally Posted by Bugbyte View Post
    ... the most common noise culprit in a setup with an inverter is the inverter.
    But can also be a dc-dc converter. (Highlighting the point I made to p3rlphr33k in my last - ie, a dc-dc converter is dc-ac-dc; but dc-ac inverter mod-sine outputs are definitely noisy whereas others should not be.


    As to NOT using cig sockets and having dedicated cable from the battery - ooooh yeah - absolutely! Apart from safety and reliabiliyy, the cleaner supply (more) independent of other equipment.


    And ground loop isolators - sometimes an effective cure (irrespective of what else is done) if strategic ground ends (shields) cannot be severed.

  4. #14
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    Well I already ordered a ground loop isolator and it has shipped, so I hope to get that this week for the audio portion. For a quick test, I unplugged the cig adapter part so the inverter/laptop are both off. I still get a buzz and the subs move very slightly so I figure that part must be the amp ground? After that, I will try the extension cord thing to see if the inverter causes problems as well. Hopefully these 2 tests and the ground loop isolator will help relieve/solve the problems and I can properly attend to and fix them.

    Edit: I really plan not to use a cig light for the inverter anyways, I don't like seeing the adapter stick out from the dash. However, I the last time I had it installed straight to the battery with a switch, my girl left it on overnight and dead battery. Figured I had to at least save on batteries for now .

  5. #15
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  6. #16
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    Do yourself a favor and dump the inverter...not worth the headache. Trust me, I know from experience!!!
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  7. #17
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    i'm not going to directly say that you need to ditch the inverter-- budget and time constraints always make this stuff tough..

    being that the laptop, and inverter were removed from the problem, the amp power, and radio power connections are probably culprit.

    i have not had too good of luck with GLI's, but they are usually a easier solution then redoing all the power connections..

  8. #18
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    I have a GLI on order, should be in this week. Over the weekend I am hoping to install that and see how that helps. I think I might need to re-ground the headunit though. It came with a connector that would fit through a screw, but I tapped it to use the original ground wire that was already with the aftermarket wiring harness.

    As with a previous setup, I didn't notice any extra noise from before I changed the headunit and added the inverter... We'll see what happens this weekend.

  9. #19
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    I look forward to hearing your results!

  10. #20
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    I wish I could say that I worked on it this weekend, but my battery for the laptop didn't arrive in time. I'm hoping it arrives today so I can try stuff tonight. The GLI came in and is hooked up and ready to go. I couldn't get to the work garage for the extension cord, didn't feel like trudging through tons of snow... Anyways, as soon as the battery comes in I"ll update as that is the last thing I am waiting on to perform any testing.

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