Don't know if these have been posted. Did a search but could not find.Anyway, this link shows a couple of Matrix's being ripped apart for stereo installs. Go to the Installer Challenge III These guys seem pretty radical http://caraudioresources.net/installgallery/gallery/
Ouch. Comment heard after driving - "Pass the Advil." Still, impressive. I wonder how much sound deadening you'd have to put in to quell the vibes... (pun not really intended).