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That's good to know. I bought the last three that radio shack had today and put one of them on the RCA cables (I was able to get both cables to lie flat in the filter) about 3 inches from where they enter the amp. There wasnt any noticable change.

As for moving the RCA's, Ive done that a million times now, or so it feels like! lol Currently, they are run through my head liner, down the driver's side front windshield pillar, through the top of the dash cavity into the radio area. That has minimized noise but thats it. I dont necessarily have t...

I was curious if the ferrites helped any. I have a 2007 Saturn Ion3 and this has been the hardest system I've worked on in 20yrs. I am having noise issues everywhere and im really trying to get anything to help. So far, I've swapped head units, amps, rcas, grounds, power wires, rerouted everything, ...