Only about 6% of "typical" music energy is concentrated in the "typical" tweeter.

However, that 6% is responsible for 90% of the imaging. Given that neither Canes nor I can hear a difference in soundstage or imaging when a tweeter is covered in a dual tweeter set-up, it is a tribute to how well integrated the dual tweeters are in the Axiom designs.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated