C5...space in the rear corners for subs?

[0TheRadioFlyer97]

I was browsing the web for enclosure designs when i came across a molded sub enclosure for the rear corner of a car's cargo area behind the wheel well. have any of you taken advantage of this extra space for somthing like 8 or 10" sub? ...for those of you who prefer to have a rolling movie theatre.... such a space might make it possible to have a 7 channel surround system