I had an amp installed to run my four speakers (front and rears). Anyway the installer ran all the cables (power,signal,speakers) down the one side of the car. I do have alternator whine, and every "How to install an Amplifier" article I have read says to run the speaker and signal cables down the opposite side of the car. My question is, how often is this really a problem? Has anyone done this and then re-routed the cables according to the guides and actually found a difference? I know inadequate grounding is also a possiblity aswell.