I was at the dealership yesterday and some guy just purchased a 2014 Jeep. He told me he didnt want the subwoofer, and was getting it taken out. I was able to purchase the sub and enclosure for $50. Anyway, I have a 2014 sport with no SUB. I feel like there is no bass in that sucker at all. Im thinking I can install this sucker, but im wondering about an amp? Do I need another amp installed for this to work? Everything is stock on my jeep.