My "stealth" set up
 

Kenwood DDX719 Head unit in the dash:
http://i172.photobucket.com/albums/w...ood_DDX719.jpg

Sub Woofer controller and USB hook up hidden in the dash storage area:
http://i172.photobucket.com/albums/w...ontrol_USB.jpg

Bluetook mic tucked away by the rear view mirror:
http://i172.photobucket.com/albums/w...etooth_Mic.jpg

Memphis Car audio amplifier 16-MR 5.750 hidden in the hatch area:
http://i172.photobucket.com/albums/w...Hidden_Amp.jpg

Memphis Car audio sub woofer in a custom box designed to be out of sight from outside the car:
http://i172.photobucket.com/albums/w...Woofer_Box.jpg

How it looks from outside the car:
http://i172.photobucket.com/albums/w...lth_System.jpg

is that amplifier attached to anything or is it just thrown back there because thats what it looks like.

It's velcro-ed in place. Not going anywhere.

Looks good. I would be worried about the amp overheating with the styrofoam placed over it, though.
Hope you don't have any issues with it.

There is space between the amp and the foam....dead air...but air. That amp doesn't push monster power and I don't blast it for extended periods of time. I think it will be ok. *fingers crossed*

I was willing to take the chance in order to keep as much of the rig as possible out of sight from outside the car. Don't want to create a tempting target for thieves.

I would attach your amp with something more than velcro but thats my opinion. Looks good otherwise.