Im going to be putting a system in my truck so I have bass for over the winter and can't decide on what sub to run off the power I have. I plan on going with a single 15" sub but unsure if I wanna run xl or lvl 5. Will be off a crescendo 3k more than likley at 1 ohm or maybe .7 if I do the 1.4 coils. Box will be built to spec accordingly. This will be in the back of a suburban if that helps any. Thanks for any and all input.