My car radio makes this insanely annoying sound.

Discussion in 'OT Technology' started by bait, Oct 16, 2006.

  1. bait

    bait New Member

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    I've got a panasonic headunit and a kenwood 4 channel amp, crappy component speakers all around. The front two are on the first two channels of the amp, the second two are bridged into a single kicker 10" sub... rear speakers are run off of the headunit. The problem I have is this: I get an extremely high pitched whine from my front speakers that is very noticable, possibly just a slight bit from my rears. The whine increases in pitch with engine RPM. It is nonexistant when: A - the engine is off, or B - the headunit is muted. If I pull the rca cables from the amp, the respective speaker loses the whine along with (obviously) any other sound. The whine does not increase in volume with the headunit volume, it stays consistent, so if you turn it up enough it gets drowned out for the most part. However, it has gotten particularly bad with this new amp. It happened with my old amp, but not nearly this loud. The RCA cables are run separately from the power and ground wires. I don't know what else to do, or how to test this. Help me please, this is driving me nuts.
     
  2. FyreDaug

    FyreDaug lolswift

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    ground loop? Or would that be a different sound?
     
  3. Synner

    Synner New Member

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    Alternator whine...sounds like a ground loop to me?
     
  4. ski

    ski New Member

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    Ground loop or massive amount of interference for some other reason
     
  5. bait

    bait New Member

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    I'm an audio noob... what does ground loop mean?
     
  6. JRock10

    JRock10 Active Member

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    take it to a shop. tell them you have engine noise/alternator whine. probably bad RCAs if I had to guess. or bad ground.
     
  7. cipriani

    cipriani OT Supporter

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    to take care of the whining sound you got a few options.
    - you can get better RCA wires, preferably ones that are shielded.
    - run the power wire and RCA wires on opposite sides of the car.
    - your ground wire should be same gauge as the power wire.
    - the ground wire should be 12" - 18" in length.

    If you do all the items in this list and you still have an alternator whine then wtf mate. but its probably the RCA's interfering with the power wire.
     
  8. FyreDaug

    FyreDaug lolswift

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    ground loop is (dont quote me exact on this) when a unit is able to draw so much current but the ground is limited all that power its using cant be put back to the ground, so naturally electricity takes its own paths to ground itself, be it grounding THROUGH your rca cables to your unit, then using your headunits ground. Its actually bad for your speakers from what I hear :hs:
     
  9. bait

    bait New Member

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    I used a larger guage, shorter ground wire to my amp and it made a terrific difference. Thanks guys!
     
  10. FyreDaug

    FyreDaug lolswift

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  11. cipriani

    cipriani OT Supporter

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    boom. knew it.
     
  12. JRock10

    JRock10 Active Member

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    thanks cause i sure didnt want to type all that
     

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