Noise grrrr, Sound system noise Options

[insec7]

Ok I got a weird problem that I cant crack. I hear this annoying noise out of my speakers wevery time the car is turned on, the pitch of the noise increases as I rev but it doesnt get louder.
Now I know improper ground causes this to happen, but I know I did ground my head unit properly so the other day I did a little test.


So I took out my head unit, and disconnected the ground from the chasis, but the head unit did not turn off, there was absolutely no change in sound/performance of it.
Then I started disconnecting other cables to figure out what grounding it. Finally when I unplugged the antenna cable, the headunit stopped working, this made me go WTF because it just doesnt make sense (to me anyway) So its obvious that the antenna is causing the noise because it serves as the ground.

Does anyone have any experience with this? Any tips/pointers would be greatly appreciated.

Thanks in advance.

[brento_bot]

hope i'm not throwing the cat amongst the pigeons but i thought that the "running the positive feed next to the RCA's cause a whine" was a myth? Spent a lot of time reading talk audio forum the alternator whine is a common question and every time the positive/RCS thing is mentioned they say not.

Most faults are cured by one of the following

• Improving the grounding in the engine bay refered to as The BIG 3
• Making sure you have a good grounding spot for you amps i.e. paint sanded off, bolts connects to the chasis and not a panel
• The gauge of negative feed needs to be equal to the positive feed both from battery to chassis and from chassis to amps
• Finally running a direct negative feed from the battery to the head unit and running some bare copper wire round the RCS terminals


Hope this helps and doesn't offend

That picture is basically what i meant, except I only needed to run it around one, and i did it on the RCA lead.