Ground Loop or bad RCA's

[Hybrid90accord 10+ year member]

Ok here we go well I have a pioneer ddeh-p8600 headunit for 6 months and I love it. I'm also running a PPI 2 channel , Audio control X-over and Jl 5001. I went to pull out my old RCA and replace them with some new monster cables RCA's and now I have engine wine and poping when I turn the car off coming out of the speakers and subwoofer. I put back the old RF twisted RCA and I still have the wine now. Is it coming from the headunit? I don't understand how all of a sudden I have engine wine. I put a ground loop isolator to the RCA's and It was still wining through the speakers etc. What in the hell am I to do. I sent the radio off to get serviced but i'm not even 100% sure it was the radio. And Ideas, the power and rcs are on different side of the car like their suppose to be.

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[iceteebone 5,000+ posts]

try re-grounding amps. ground all amps to the same spot and make sure it is a good ground. also i use to get slight whine with my 8600, so i grounded it directly to the battery using 12 guage wire and i had no noise at all.

 

[Hybrid90accord 10+ year member]

yeah all the amps are grounded to one location via ground distributor block.

 

[blueadidas05 10+ year member]

my shit is doing the same thing, i'm going to try to reground it today and i'll let ya'll know if its the same problem. this seems to happen more than often and nobody ever knows what it is.

 

[Hybrid90accord 10+ year member]

cool, let me know man

 

[johnecon2001 5,000+ posts]

Common reason is either a bad ground on the Head Unit or on the amplifiers. Replace both and go along your merry way.

 

[Hybrid90accord 10+ year member]

well I get my radio back from service today so i hope everything will be fixed and no more ground loop noise etc. My fingers are crossed

 

[Slody4Futbol 10+ year member]

do not unplug or plug in rca's with the radio on... ESPECIALLY on pioneers...

 

[Vestax 10+ year member]

What we used to do at the shop for noise was ground the outer shield of the RCA's. It was a temporary quick fix or a bandaid for noise. It worked 60% of the time. Try doing that, it's a very inexpensive fix.

Another quick solution was to ground the amp all the way back to the battery's ground. This way you don't have different level of voltages in your system, which is cause of noise.

A bad alternator could also be the cause of noise as well.

 

[forbidden 10+ year member]

Curios as to why you replaced a great rca with the Monster (boycott Monster Cable products dude - they have a lawsuit going against anyone who even uses the word "Monster").

 

[Hybrid90accord 10+ year member]

We use Rf rca's at my job all the time, and they give us alot of problems so that's why i went with the moster cables cause i've never had a bad experience with moster cable personally. some times the Rf's work and sometimes they don't

 

[Hybrid90accord 10+ year member]

A bad alternator could also be the cause of noise as well.

the car i have all my music in is my 03 mazda bough brand new. I replaced the battery with a optima yellow top, what are the chances in your opinion of the alt. on a 03 going out so soon in your opnion? Is that covered in the factory warranty? I only have 30,000 miles on the car

 

[Vestax 10+ year member]

the car i have all my music in is my 03 mazda bough brand new. I replaced the battery with a optima yellow top, what are the chances in your opinion of the alt. on a 03 going out so soon in your opnion? Is that covered in the factory warranty? I only have 30,000 miles on the car

Very slim chance, I was just throwing that out there because bad diodes in an alt happens. Since your car's new, most likely not.

There are more types of noise eliminating units out there too like ground loop isolators and noise filters on the power wire of your HU.

 

[Hybrid90accord 10+ year member]

It was the radio, I got it back from service today i hooked it up today along with my new alpine 4 channel and new 8002 and it sounds great no noise just crystal clean music.