Well, since I'm the only member online at the moment, I'll say "welcome" and offer a little (but not a lot of) help.
Definitely unusual..... although we see postings of an occasional driver failure, it's not common. And to have two is really uncommon. In the big scheme of things, I'll beat many to the punch and say that you should call Axiom. I think they're there on Saturdays.
But I would take a moment to just switch your Left and Right speakers, just to make sure the loss of tweeter output stays with that speaker and does not "now switch to the other speaker" indicating a likely problem with your receiver.
Really, though, if a receiver is at fault, you would likely lose a whole channel (speaker's) worth of sound, not just the highs.
So it IS likely the tweeter itself.
By the speaker it lived,
by the speaker it died.
They said it was murder,
but it was tweetercide.
I'm tired.
