Thanks for the great info. Wow, you have really been through a journey. Curious: what are you running on the front end (source, pre, amp, etc.). Wondering how much of this is related to that or the room, etc. I say this because I never experienced with my my former Lores - the Audax was a great tweeter. I remember my top end being free of all sibilance with Quicksilver Mini Mites and cary Cdp-1 for source. The Pendragon as well, even with a lesser amp, but my room is also treated a bit so maybe I am a little spoiled with that, yet not the whole story because I've heard sibilance in this room with a different speaker. Sibilance is one issue I have never experienced with these, but when I did in the past it was usually a front end issue. I remember experiencing this with Paradigm speakers, but then again my electronics weren't up to snuff then either. Are you running tubes? Keep us informed...