I am in this hobby for more than 50 years, and that means I grok why it is easy for someone to come to an understanding that YG Haileys belong to the highest echelon of anything available in loudspeakers. But it also means I understand why Hailey does not, and something simpler like the Fyne can thoroughly outclass YG on convincing musicality and realism. Maybe someone who's been doing this over 60, 70, 80 years will chime in. How many decades does it take?
I've heard a lot of highly-engineered, complex speakers over the decades, with reputations in their time equal to YG's today. And they were all controversial and ultimately amusical. YG is from the school that sacrifices everything else elemental to the musical illusion, to measured linearity - frequency, phase, time. Unfortunately given today's technology, these obsessions, pursued equally together, strangle practical amplifier choices, and otherwise fail to address what are often more important cues for musical realism, like authentic tone, dynamic elasticity, coherence of driver behaviors, etc. YG, like Magico, has a clear point of view on this, and they execute against that PoV very well. Unfortunately none of that assures a musically-convincing speaker, nor that a musically-tenable amp can be mated to it. It takes a balance of factors. Time, frequency and phase linearity matter but the way YG achieves them at the expense of all else -- and still not reaching perfection -- sacrifices too much of the organic origins of sound propagation of real music. Perhaps that's why they sound most convincing on electronica, where there's no organic origin reference. Yet still, when too much was going on at once in crescendo, Hailey lost the threads in the densest music.
Phil