Hi guys, when I bought my new pride and joy, the hand written piece of paper in the side window mentioned "Bose". I can't actually see any sign of any Bose equipment. No amplifier under the drivers seat, no sub-woofer in the back (that I can see). Is there a simple way of knowing if I have a Bose amplifier or not. Looking to buy a new head unit so I guess it is important to know.