When I had the wheels swapped, I noticed that the previous owner had a complete rustproofing/undercoating applied. My theory is that, if I penetrate the underside with my mounting screws, I will spray the area with more rubberized undercoating. That should protect from rust.
The occasion when someone sits in my backseat will be pretty rare, but I know that is a danger.
The amp is going to be driving a pair of bass shakers, so I'll be drilling into the floor either way. But because of space restraints, I may have to fabricate a rack for under the seat, or mount the amp somewhere else.
I'll start a thread in the A/V forum and try to post some pics up once I get the project underway. I have the bass shakers, but I still need the amp.
I ran my power wire along the driver side, from the battery into the fender. From the fender it goes in to the left of your feet. This is the same path the stock wire cluster takes.
The amp is under the seat, screwed to the carpet. Floor mat slightly covers it. I have never had it overheat... not in the Aveo anyway.
I'm still not seeing how to get through from the passenger side of my 2011. And I'm not sure how to get to it on the drivers side either, I'm a n0ob at this