My problem is that I ran everything down the driver's side tunnel, which is where everything else is. I didn't do anything through the center console.

The hard part was getting stuff around the B pillar, and along behind the back seat over the rear wheel well. Did you have any trouble in that area? Mine is a 4-door 2000 Accord. Was yours a 4-door?

Like I said, the alternator whine is very faint. I agree that there's probably some sort of ground loop issue, too, since I'm running multiple amplifiers. I'll see if the ground loop isolators get rid of the problem first(30 bucks versus the hassle of ripping up my floor again is a no-brainer), then re-route my audio cables later if that doesn't solve the problem.

The old "power and gnd separation" is a myth as all of the amplifier currents travel through the car chassis back to the batt/alt anyways.

I've never heard of needing to separate power and ground. I've only heard of needing to separate audio cables and power wires.

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Tony Fabris