Hi Ichigo,

I think all of this confusion is due to what you are actually looking at, which is the back of the tweeter housing. Axiom has been using a plated metal can on the back of it's tweeters and recently changed over to a black plastic cup. There is no difference whatsoever between these tweeters, it's simply a running change which is invisible unless you're looking inside the speaker. If this bothers you I'm sure we can send you one tweeter with the metal can.