Well...not to bust a bubble but flexing the roof...even alot, in a suburban isnt that difficult. At the shop I could get a single audiobhan 12" in a prefab ported to flex the roof in one of those things like crazy.
Anyways get it on a meter to get some real info on it...I see your in JAX...just drive down southwest a bit and go to Shawn Fleming's...He has a TL.