Bose Panaray System
Yes, this is also a Cadillac special. Because? Because Bose put 34 speakers in the CT6, most no bigger than a watch face in size. The idea was to "de-centralize" the sweet spot for the sound image, so that no matter where you sat in the car you'd have a clear separation of sonic clarity, and be able to visualize the soundstage. To do this, there are speakers everywhere, from in the A pillar to the doors, to the center of the instrument panel. What's especially cool is that a speaker array rises out of the dash when the CT6 ignition is fired. And if you sit in the front, both headrests also get speakers that are specially tuned and phased (so that the sound isn't distorted because of the close proximity to your ear).