"The old "power and gnd separation" is a myth"
That should have been power and signal, I was getting ahead of myself.

Mine is a 2 door and I'm not sure about the back seat differences, but there was oodles of room. I went under the back seat and along where the wheel well meets the trunk floor with everything.

I would suggest pulling the empeg out and running it off the wall wart and then run a different set of RCAs to the amps. That way you can determine if it's a ground problem with the amps, which is likely the cause.

I would consider any audible whine or hiss to be a problem in $2000+ stereo.

#080000512 green 12GB