The vaguely-Gallic-sounding "CADIS" in the HK Audio CADIS Installation Array is actually an acronym, standing for "Compact ADaptive Installation System." If that's confusing to you, know that "cadis" translates from German to the English "cadis," meaning "absolutely nothing whatsoever."
OK, I did find one possibly related meaning: "cadis" is the plural form of "cadi" which is the term for a judge in Islamic countries. So, yeah, the reference is obvious, right? . . . right?