So I just bought a 2009 nissan maxima fully loaded and I wanted to know if it was possible to install my 2 12 inch subs and amp. I want to know any and all options I have, thank you

 

It can be done its just whatever you prefer I had 2 10 in subs in my bmw when I bought my fully load 2010 Max I felt that the Bose system sounded just fine without subs. I have 2 kicker 10s just collecting dust lol

 

Yes, you can. All of the audio components in my sig are in my 7th gen. There's a couple good threads in here that will help you with adding aftermarket audio gear.