That space in the rear gate is just to house the latch mechanism. The grill you see is just the access panel for repair and replacement.That doesn't make sense if the floor can get wet or muddy .... i think the subwoofer and the amp are in the rear swing door( spare tire door)
My thought would be to replace the rear two pods with a custom sound bar that goes across the whole back. Like this for the JL, but I'm thinking holes for two 6x9s or 6 1/2s, and two 8 or 10 inch subs. Will have to see whats up once I get one on hand.I have this:
... tho, I killed the woofer as it was my very first install, jus need a new woofer and I'm good.
something Bazooka; passive or powered (haven't decided) .
I was thinking of getting two 8's or 10's and having 2 tubes vertically on either side of the backs of the rear seat .
What I have now will not fit.
... rear of the 2 door.