In my opinion this one the greatest improvements in audio in 40 years. AA is full of discussions about it, but there has been nothing here. Maybe that a $575 tweak is beyond Audiogoners?
airy - Pertaining to treble which sounds light, delicate, open, and seemingly unrestricted in upper extension. A quality of reproducing systems having very smooth and very extended HF response. (Stereophile Glossary)
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