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bad to run signal wire with power wire?

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Old Nov 19, 2009 | 06:25 PM
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bad to run signal wire with power wire?

Before I do an install I need to find this out. When I had an install at FS once the guy ran the power wire along with the RCA cables and I was getting engine noise...

At a certain RPM I could hear a loud whine noise. Is this because he should of routed the RCA's on the other side of the car?
Old Nov 19, 2009 | 07:15 PM
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Always keep the power wire seperate from rcas as much as possible. Doesent suprise me about the fs install either, most likely the wiring ran like that was causing the noise.
Old Nov 19, 2009 | 07:24 PM
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yes, thats most certainly from the alternator. It is common practice to run the rcas on the other side of the vehicle from the power wires. I also use a noise reducer which stops alternator whine. You can probably find it at walmart or any audio shop.
Old Nov 19, 2009 | 07:56 PM
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I've always ran them together to save, time, so far I haven't had any problems. right now its running along side some 2 ga. welding cable and theres no noise, but everyone else says its bad
Old Nov 19, 2009 | 08:03 PM
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Originally Posted by Darin
Before I do an install I need to find this out. When I had an install at FS once the guy ran the power wire along with the RCA cables and I was getting engine noise...

At a certain RPM I could hear a loud whine noise. Is this because he should of routed the RCA's on the other side of the car?
If you are chassis grounding your amp it doesn't make a difference, just use good quality RCAs.
Old Nov 20, 2009 | 12:52 PM
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Thanks for the info, I am guessing he ran the power wire with the rca's to save time. At FS they go as fast as they can...
Old Nov 20, 2009 | 02:59 PM
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In 20 years I have NEVER seen RCA placement cause engine whine nor have I seen relocating RCAs correct it.

It is a myth.

And any installer goes as fast as they can. A good one goes only as fast as the job can tolerate though. Keep hatin on FS though..
Old Nov 20, 2009 | 03:11 PM
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Dukk, it depends on the quality of RCA's.... Properly shielded (or even just twisted pair) RCA's won't make noise, but (especially when you consider the customer base in FS and BB stores) there are people out there that opt for wiring not made for car audio simply for cost reasons... Especially the really chinsey stuff that uses tinfoil for the negative conductor! Now that's But 90% of the time, it's not RCA's. Bad grounds are typically suspect

Last edited by RomanticMoments; Nov 20, 2009 at 03:15 PM.
Old Nov 20, 2009 | 03:22 PM
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I will repeat: In 20 years I have NEVER seen RCA placement cause engine whine nor have I seen relocating RCAs correct it.

And I have seen, installed, and used the entire spectrum of cables from freebie VCR patch cables on up.
Old Nov 20, 2009 | 03:25 PM
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Further to that - from what I see, for a good 90% of the amp installs at FS the customer buys an amp wiring kit that contains an adequate "car audio grade" cable.

It's the backyard bashers that go rob the DVD cable from their TV to 'git er done'..



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