Congrats, Kenturkey, on your purchase.

I've had the same experience TWICE now with tweeters sounding harsh upon the first few listens. You're not alone. They were very shrill as soon as I installed them, so much so that they hurt my ears and caused me to end my initial listening sessions much earlier than I had figured on. They both leveled out after some time. So it seems like you have experienced the same thing that I did.

So enjoy your new Axioms, bud. Welcome to the club.