The old Bose systems were and are very unique, they are a direct reflecting system meant to use the acoustics of the room and placement is critical, just like the Klipsch Cornerhorns I once had they absolutely had to go in a corner. The new Factory Kicker sub unlike its predecessors is in an acoustical enclosure that is down facing much like many home sub woofers. It is in the center of the back seat and very non directional. My dog sleeps on top of it all the time. It will shake the truck if I choose to but I don’t. I use a pink noise generator and a real time analyzer to set it up. I run it flat with a slight bass boost. I majored in acoustical engineering in college and worked in a stereo store back when your Bose were popular, I demoed them a lot in our high end room hooked to a Phase Linear 400 I remember them well. I run a 6.1 all Klipsch system at home now, the Cornerhorns are long gone someone just offered me too much money for them, I had 4 of them in a 20X30 basement room with only 1 chair in the middle of the room. For parties the chair was removed and the room became a dance floor complete with mirror ball. At the time I was a working DJ and computer tech.