Anyone know this? I am seeing this term more and more. I understand bi-polar speakers have multiple drivers facing in different (not always opposite)directions and that the drivers are in phase. Di-polar are the same but out of phase. Is tripolar just a snazzy name for adding a third (identical)driver to a speaker? I ask this because I have M1, M33, 895 and BPS400 Mirage speakers. They are all Bi-polar. The M1's and M3's, however, have addition drivers on the front only...(tweeter &mid identical front and back and bass drivers on the front only) Should the name tripolar been given to them long ago, or is there more to it than that?