99 civic install

Im curious how any others with a similar honda have installed amps and other components. I ask this because I am wondering where the best place near the trunk would be to ground, and if elimination anyone with the same car has been able to eliminate ground loops. My amps are mounted on the back of the 60/40 split and I have reduced noise to the point where it isnt too noticable with volume at negative infinity, I just want to try and reduce in the event I need to turn up gains on the amps.

no noise with engine off
noise pitch increases with rpms

My setup is as follows:
1 (1000) watt amp, rockford powering 2 subs
1 (500) watt amp, rockford powering highs
1 signal processor
1 farad capacitor
riocar with kenwood head into aux inputs

Hey Loren, what year is your Civic?

i have no ground loops, and my installer grounded at a screw near the spare. i'll look tommorow exactly where it is.

99.