Whine in speakers even with car not runing

[Silvaccordex01]

i have this very odd sounding whine in my speakers even with my car just turned to accessory stage (turns the stereo on not the car). It starts off low gets higher than goes back to a low pitch and just stays there. If i turn the music up i cant hear it because the music drones it out. I also have alternator whine when i turn the car on that fluctuates with my rpms. Im guessing if i figure out out to fix one it will fix them both becuase there being caused by the same thing. I already tried unplugging the RCAS at the deck and the noise is still there so its not the RCAS. I have the high end rockford RCAs and there ran seperatly from the power wire. I have JL ZR 6.5 in the front and JL VR6x9s in the rear. I have my 2 amps and my capaciter grounded to the frame in the trunk through one JL ground lug ground. Any help would be greatly appreciated.

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[Silvaccordex01]

I saw that page but none of those fixed the problem.

 

[squeak9798 5,000+ posts]

Have you tried muting plugs on the amplifier's inputs?

 

[squeak9798 5,000+ posts]

I already tried unplugging the RCAS at the deck and the noise is still there so its not the RCAS.

That just means it's not the HU.

It could be the RCA picking up noise from somewhere, or it could be the amplifier.

Try muting plugs and unplugging the RCA's at the amplifier and see if the noise is still there.

Also you could try connecting the amplifier directly to an external source (walkman/Ipod) to see if the noise persists.

 

[Silvaccordex01]

What are muting plugs? I have a jl audio 300/4 running my speakers. The speakers are all connected directly to the amp. Obviosly the speakers in the front are connected to the crossover and the crossover to the amp. Does this sound like a ground loop problem. So since i unplugged rcas at the HU that rules out a ground problem at the HU?

 

[squeak9798 5,000+ posts]

What are muting plugs?

http://www.davidnavone.com/MutingPlug/Muting2.wmv

So since i unplugged rcas at the HU that rules out a ground problem at the HU?

If it still makes the sound without the RCA's being plugged into the headunit, then obviously the headunit is not the primary cause.

Try the two things I suggested.