Alternator Whine...HELP!

[MeanGreen03]

I just installed my system and I'm getting that evil whine. I have a 4 channel amp and it is only occuring in my rear channels. If I plug the rear channel RCA into the front channel and vica versa the whine happens in the front channel. Could it be a bad RCA cable or what should I look for and test?

 

[Thumper8302]

i honestly think ur rcas are groundin somewhere.... try another pair and see if that helps u any

 

[thehoe92]

make sure your RCA's are ran on the opposite side of the power
maybe that one is close to some power wire

also you could try grounding the shield of your RCA's on the back of the head unit and see if that helps

make sure you have as few grounding points as possible

 

[MeanGreen03]

The RCA's are ran on the opposite side of the power. I have 3 sets running together and thats the only one it's happening on. So grounding the sheild of the RCA will show what? Do I ground it with the RCA's plugged in? What do you mean as few grounding points as possible?

 

[Boomer73]

Sounds like a ground loop. Just get an RCA ground loop isolator from radio shack for $12 and be done with it.

-B

 

[MeanGreen03]

I gounded the RCA shields at the back of the HU going to the rear channels and it made a loud buzzing noise. If I move that RCA wire close to the power wire by the amp it amplifies the whine but it doesnt do it with the other RCA's. I switched both of the RCA's so that the front is the rear and the rear is the front and the buzzing/whining still occured in the rear. I cant tell if my subs are getting the feedback too(I can hear a slight static noise if my ear is really close to them), but it is definitely not comparable to the rear doors. The RCA's do run along the power (around 1.5ft) as that is inevitable as they all have to run up into the amps.

 

[solored]

Just run your front rca's, hook all your 4 speakers to the front, thats what i did.. I had a hifonics zeus 440 4chan, also changed my rca wire as well...I only have the one rca wire thats why im running of the 2 chans... I have 3 sets total, 2 sets are cheap, the good one is a knu koncepts one... if you have crappy rca's they have very little resident sheilf on them... the ****** ones i have are the blue monster ones GARBAGE get some good high quality ones from knu koncepts. Also if your running 8awg wire to your amp (power grnd) that could be another fault.... run atleast 4awg... good luck with her! do tell when you figure it out... try to avoid a ground loop isolater as it will just lead to another problem... there is a reason why it is doin what it is doing, correct and dont add something to counter act the problem... thats your last step...

 

[MeanGreen03]

I have 0awg running to distribution blocks and from there 4 awg to the amps. I'm running the better Rockford Fosgate RCA's. What are the best RCA's out there that have the best insulation? I was thinking about getting a 6-channle RCA wire so that way the wiring would be much simpler. I'm going to try to re-route the power wire when I have some time to see if I can reduce the length of the power and RCA's running along each other. Any other advice is greatly appreciated!!!

 

[solored]

http://www.knukonceptz.com/productDetail.cfm?prodID=KRY4.4M

Thats what I am going to be running, I have those but just the 2chan normal rcas not the 4, they are super heavey duty.... yeah try everything BEFORE a ground isolater... even sometimes re grounding the amp... like i had a 4 chan and 2 chan alpine amps running off same ground and what not (not my install came with truck) they didnt have any noise coming through... and the wiring set up was just ******, like i dont even know what the guy was thinking, but it worked.. so i re wired everything right, and im using a hifonics zxi440 4 chan amp.. and hooked up the same i got bad whine through the speakers... most time is a faulty ground, but i just used a different rca and ran 2 chans off the 4 chan amp and it was fine... i was told to if the gains are to high you could get that noise as well.

 

[01TX_Tahoe]

i would replace the RCAs or trace them out to make sure they're not pinched anywhere. they could be grounding out somewhere in the truck... i've had that problem before. i ran the RCAs to the back seat and someone else put the seat back in without adjusting them... needless to say they got pinched and had to be replaced..

i've tried to use Streetwires RCAs for most of my projects. i've never been disappointed with them.