Some songs have it and some do not. Some stereos can reproduce it and some can not.
I just happened to put together a system recently that beats you over the head with prat. Wish you could hear it. It blows my mind what this system can do and I feel a little smug y’all missing out. It is a completely different way to experience music. Not detail, not soundstaging, not tonality, not bass. It’s a pulsation going through the whole song /band top to bottom.
Technically YG talks about phase coherence through the x-over. It is not the same thing as a 1st order x-over. I found a 4" driver with long throw Xmax timing was off vs a normal Xmax 4" driver.
By optimizing the amplitude, phase and phase slope, the drive units are phase coherent over a huge range—for an octave or more around the crossover point. Across this wide range frequency, each driver is moving in exact synchronization with its neighboring drive unit. To your ear it seems like there is just a single source of sound.
It is difficult to overstate what a revolution this is. To our knowledge, no-one else has been able to achieve this level of coherence. The degree of scientific and engineering knowledge, the precision of measurement and the cost of running the simulations required place it outside the typical capabilities of manufacturers in our industry.
These have it on my system:
CHAI - sayonara complex - LIVE at STUDIO COAST (The CD studio version does not)