+ Reply to Thread
Page 19 of 19 FirstFirst ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Results 271 to 277 of 277

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

  1. #271
    LordX's Avatar
    LordX is offline Member



    Join Date
    Aug 2009
    Location
    Syracuse, NY
    Posts
    31
    Post Thanks / Like
    Mentioned
    0 Post(s)

    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
    JohnKimble's Avatar
    JohnKimble is offline Junior Member



    Join Date
    Oct 2013
    Location
    California
    Posts
    29
    Post Thanks / Like
    Mentioned
    0 Post(s)

    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
    bigBASSdevin's Avatar
    bigBASSdevin is offline Junior Member



    Join Date
    Dec 2013
    Location
    phx az
    Posts
    2
    Post Thanks / Like
    Mentioned
    0 Post(s)

    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?




  4. #274
    Selvos's Avatar
    Selvos is offline Junior Member



    Join Date
    Jan 2014
    Location
    Europa
    Posts
    11
    Post Thanks / Like
    Mentioned
    0 Post(s)

    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
    anger's Avatar
    anger is offline Member



    Join Date
    Aug 2012
    Location
    Southern California
    Posts
    89
    Post Thanks / Like
    Mentioned
    0 Post(s)

    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
    Trasero05's Avatar
    Trasero05 is offline Member



    Join Date
    Dec 2013
    Location
    Phoenix
    Posts
    30
    Post Thanks / Like
    Mentioned
    0 Post(s)

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

    Very thankful I found thisss it really help me




  7. #277
    sbsyncro's Avatar
    sbsyncro is offline Junior Member



    Join Date
    Jun 2014
    Location
    SoCal
    Posts
    1
    Post Thanks / Like
    Mentioned
    0 Post(s)

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

    Hey y'all. Found this thread via Google search and figured I'd post up my situation and see if anyone has helpful advice.

    Problem Description: Soft background hiss/whine when engine is running that is noticeably louder than the normal amp hiss (which goes away when I turn the gain down). It is not a high-pitched whine that goes up and down as I rev the engine. More like the sound of a low-rpm motor running at the same RPM regardless of the engine RPM. There is a slight variation with engine speed but its not the screeching whine I've heard before in other cars.

    Install notes: Pioneer AVH-5600BHS HU, Infinity 474a amp, Infinity reference speakers front and rear. Knukoncepts Basik RCA cables. Klarity 14 gauge speaker wires. 4 gauge battery lead, 4 gauge ground to clean, scraped attachment to body. RCA cables run up opposite site of car from power.

    What I've Tried: Unplugging RCA from the amp stops the problem. So does puling the RCAs from the HU. Interestingly, only 3 of the four RCA cables (and therefore speakers) is exhibiting the noise. I can pull the front 2 channels and one of the rears, have pure sound coming from the remaining speaker without background noise. As I plug in the remaining leads, they will each have the background noise.

    No effect/improvement: Isolating the amp from its mount. Swapping RCAs to different channels. Running separate RCAs directly between HU and amp

    Made problem worse: Grounding the amp body. Grounding body of HU with separate lead. Wrapping wire around RCAs on back of HU and grounding to the HU body (per the first post on this thread). Each of these made the ticking noise noticeably worse.

    Not sure what to do next. What is puzzling me is that one of the channels is NOT having the noise, yet is wired exactly like everything else. FWIW, that channel doesn't exhibit the noise regardless of which cable I use, so the problem follows that signal channel, not the RCA...

    Any suggestions short of using a pair of GLIs? (by the way is there such a thing as a "good quality" (or better quality) GLI, or are they all bad in terms of attenuating signal and flattening dynamic response?




+ Reply to Thread
Page 19 of 19 FirstFirst ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum