It is possible... sorry I don't have any pics either. two years ago I installed Sony low profile 6x9 in the back. I didn't have as much problem with magnet, just had to open it way up for the 6x9.
Before I had those, I had installed the sony 5x8 (dash speaker) in there.

Sorry... they have since been removed to make room for my future roll bar, which will go down thru that speaker opening.