So I failed to mark the ground terminal on my Dynaudio MD 100 tweeter when I took it apart as I want to paint the surround black (don't care for the grey).  Now I find that I can't tell which is the '+'  side as the speaker will go back in either way and the posts are identical.  I took it's twin apart more carefully but find the opposite terminal was '+' on it's surround case.  Now I'm more confused than usual.  Are these tweeters not phase sensistive?