...but, the original Ohms were single drivers, as are the HHR 'flagship' units....
The current Ohm offerings are 2 driver units, with a 'Walshed mid & bass driver with dome tweeters. Heresy vs. 'bottom line' costs? Perhaps...
My diy 'clones' have gone to a Walsh tweeter as well. And I eschew using a cabinet for the low bass for a subwoofer....which is omni by physics anyway. Heresy sublimation? Well, yes. But the final effect 'may' be closer to the original intent....imho.
We can discuss....and I can always opt for 2 subs....;)
Multiple materials applied to a single driver strikes me as having inherent weaknesses, even with modern materials and adhesives. That, and the decision where to place the 'physical crossover' from one material to another seems problematic and a potential issue to be avoided...
But, I'm just an outlier with an attitude...*s*
That...and a 'footprint' in a given space is dinky....against a 'monkey coffin'. 9" dia. x 42" tall, vs. what? 😒🤷♂️
Beat that.