Update: Had an 8" Rockville under seat powered sub installed under driver seat. All in all it ran me about $270l. However, the place I went to said they could not find the ANC (Active noise cancellation) mic anywhere. No forums they said had anything about where it was. If you don't know by now, all cars have a mic that takes in the outside noise (engine/wind/others) and shoots back through the car speakers a slight sound you don't notice to counter the soundwaves to make a quieter ride. When you install a sub, you have to disable as it would cause the sub to match the systems sound back with overwhelming continues bass. The installers said they think I don't have one but to test out. Well I do lol. However it is weird, it only seems to activate when no music is playing and I am foot off the gas and the car is shifting down giving a higher engine pitch. What is even weirder, it does not do this when speeding up... Currently I do not plan to have disabled and will try to live with it. It really is not noticeable as long as music is playing. The 8" powered sub I bought provides just enough bass to the car where it is not overwhelming.
PS: ANC disabling runs about another $70-$80 for labor so it would have been around $350 for sub and install total. If anyone finds anything on where the ANC is do let me know. Maybe down the road if it is annoying I will take it back in. Highly recommend adding to the system though. For it being BOSE I was actually quite disappointed in the sound spread as it is all focused at the front of the car (yes I adjusted Fade).