Actually this air space is spot on and optimal for a JL 10TW3 and sounds amazing in this box. Thats plenty of room for several 10' subs and larger 8'' subs as well. (sound qubed HDS 2.2)
I have the same blue hybrid in a 2024. Got it beginning of Feb this year. So far so good. Time for a single 10'' sub though. Audio is the worst I've ever heard. So far no battery issues in Georgia 22-25 degree winter weather.