Hello Avi,
This is most unusual. Please check the gold links between the two sets of speaker terminals to make sure they are making good electrical contact between the woofer and tweeter/midrange sections. If those are inadvertently displaced, the tweeter section may not work.
In my nine years with Axiom, I don't ever recall two replacement tweeters in succession being defective. They are carefully checked on a sweep frequency recorder on the line to make sure they conform to the response limits profile in the computer.
Regards,
Alan
