Looking for some advise on a 2014 XLT stock radio and adding a subwoofer under the rear passenger seat.
I am specifically looking to purchase and install the Sony amp/sub that comes equipped on other fully loaded models. I am only leaning towards this option for ease of install and it will accommodate a future under seat storage box.

How difficult would it be to install this setup to the stock XLT radio.
Are the wires for a sub installed in all models?
Thanks for the help.