Hmm that’s a thought. It might sound good from the driver's seat but I’m sure it would blast the hell out of someone's ear if they ever sat in that back seat. Plus it might look a little odd depending on the color scheme and how much it sticks out. In my setup I have 5 1/4 rockfords in the front kicker panels, infinity 6X9's on the back shelf, two tweeters mounted up on that rail between the diver/passenger window and the windshield, and a 12” Kicker CVR sub in the trunk. It a well rounded system and sounds great. The only thing I plan on doing is replacing the 5 ¼ rockfords with 6 ½ infinities up front. Infinity makes great speakers that are clear as a bell and can really blast out some tunes.