Rear seat Subs...?

Celica 2000 GTS

As my car needs to remain 'wife-friendly', it needs to keep the stock look and not have any tech stuff around (shame as I would have liked to put in some Genesis amps...)

Has anyone tried to install 6 inch subs in the stock locations next to the rear seats? Results?

Been looking at the JL's. Is there enough space to build an enclosure behind the panel?