noise in my car and can't diagnose

Ok I've been reading the ground stickys and I think that MIGHT be my problem here but I don't know where at.

I've tried everything I can think of from the articles. Basically

-There is a whine noise that varies with alternator when car is on. When car is on ACC the whine is still there though.

-There is no noise with speakers hooked up straight to HU, only when the speakers are hooked up through the amp.

-I got rid of the factory ground and power wires and hooked them up straight to battery/chassis (for HU)

-The RCAs are on the drivers side of the car and the power wire is on the passenger side. These are OFC Stinger shielded wires.

- I even switched my HU to my old one that never had this problem and it still had the noise.

The only thing I haven't tried is grounding the RCA cables or whatever because I'm still not sure how to do it. which is correct, ground them to HU chassis or car chassis? I've heard both sides. and mainly do I cut the actual end of the RCA cable where the plastic covers the RCA tip or do i just strip some wire towards the HU end of the cable and wrap wire around it?

Should I even worry about the RCAs or is it a ground problem. I've checked all grounds with no result.

Thanks to all

Is the whine heard at the same time as the fuel pump relay?

Did you try disconnecting the antenna?

Are the underhood grounds in prime condition? At battery, alternator, firewall, engine, etc?

Did you try disconnecting RCA's at amp? Result?

Did you try running RCA's outside the car? (for test purposes only - obviously)

Sometimes a ground loop isolator on the RCA's work.

When you hit the brakes I understand that you don't mean that it whines but that there is a pop, is that so? If so, add a cap to the brakeswitch wire.

thanks for the reply

"Is the whine heard at the same time as the fuel pump relay?"

"When you hit the brakes I understand that you don't mean that it whines but that there is a pop, is that so?"

"Did you try disconnecting the antenna?"

"Are the underhood grounds in prime condition? At battery, alternator, firewall, engine, etc?"

"Did you try disconnecting RCA's at amp? Result?"

"Did you try running RCA's outside the car? (for test purposes only - obviously)"

Sometimes a ground loop isolator on the RCA's work.

its a kenwood dpx701

i also used my old one, a panasonic

update: i hooked up a portable cd player to the amps inputs and no noise.

anyone? thanks