ORIGINAL: Jeremiah 29:11
Well if there is no tire in the trunk but it has a battery then I would think the trunk is probably a mid-size trunk.....probably a little deeper than the original Challenger.
Where is the subwoofer? Yea, have to be able to have a woof somewhere? Hopefully there is room.
Mustangs have the subs located on the right side next to the quarter panel.
The Charger trunk is cavernous!
Just guessing by comparing (projected) dimensions of the cars overall, I'm under the impression that the Challenger will lose a very small amount of leg-room in the rear (4 dr vs 2 dr), so the trunk SHOULD remain extremely large. Even if 3 inches were removed from the trunk area from rear bumper to rear seats, there will be PLENTY of room to install ANY size sub-woofer you desire.
I think the lack of a spare tire is more to save weight than room. I can't imagine room being a problem.