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Reload Thread: >>>Engine whine and ground loop fixes... take two

  1. #271
    LordX's Avatar
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    Re: >>>Engine whine and ground loop fixes... take two

    Hey guys - just read through this thread after getting my system installed in a new car.

    Had it done by a shop.

    Head Unit: Alpine 7897 - old school unit - but it rocks.

    The shop definitely ran the power and grounds on different sides of the car (saw it myself when I showed up half way through the install).

    I have 2 batteries (1 stock and 1 audio) - wired in parallel because my old isolator will not work in this 2012 Avalon.

    Noticed the engine whine right away.

    The Alpine 7897 has the rca outputs that 'dangle' out of the back of the unit. Is the ground trick still applicable?

    I saw a pic in the beginning part of the thread that looked like it.

    Is this trick something to even try with an Alpine HU?







  2. #272
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    Re: >>>Engine whine and ground loop fixes... take two

    Disregard. Ground loop was solved by running a new and larger ground from my head unit, to the body of the car. Sanded the paint away, self tapping screw and lock washers made for a solid grounding point. No more alternator whine!
    Last edited by JohnKimble; 11-25-2013 at 08:28 PM.




  3. #273
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    Re: >>>Engine whine and ground loop fixes... take two

    how the f*** do i post a new post to the forum? yes i am a newbie and cant figure it out for the life of me...do i need to pay?




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    Re: >>>Engine whine and ground loop fixes... take two

    Ok I have a Pioneer x1500.

    I fixed the alternator whine by wrapping the RCAs. Does this also apply to the sub rcas? My subs do not work now. They have their own ground running with the cables Which I attached to the main ground wire on the wiring harness.

    THanks




  5. #275
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    Re: >>>Engine whine and ground loop fixes... take two

    Just want to confirm that running the power and signal too close together CAN cause this...to anyone thinking it's BS.

    I recently bought a truck with a sloppy install, so I decided to clean it up and when I finished I had the dreaded 'whine'..and didn't introduce any new equipment to the system. So I pulled up the carpet again and separated the signal and power wire (I ran them right next to each other for a good 3ft) and problem solved.

    I've also had luck grounding the RCA's to the head unit on another install.

    Thanks CarAudio.com community for all the help and info!




  6. #276
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    Re: >>>Engine whine and ground loop fixes... take two

    Very thankful I found thisss it really help me




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