John,

Welcome to the boards and the sound of Axiom.

How exactly have you established that the two tweeters differ? I placed my ear close to both and I admit that in a near-field listening condition like that they do sound different. But that's because the mid-range is right below one of them and it's therefore not possible to just listen to the bottom tweeter.

BTW, please stop depriving the world of your revolutionary new motor .