Anthony, I would suggest purchasing two 1:1 audio transformers and using
them in the cable to the equalizer. Almost everything else will cause
trouble. Car "grounds" (notice the quotes), aren't really. From the audio
or rf point of view, a couple of meters of thin sheet steel spot welded
here and there is not ground. Since you are playing mp3 $10 (each) audio
transformers should have good enough quality <g>.

Peter

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