I think I just found the perfect Herb speaker. It uses a hand-crafted 5" wide-range driver with a cone made from Japanese calligraphy paper. It rolls off around 50Hz at the bottom and 30kHz at the top. It has no crossover. Its cabinet is made of MDF that responds loudly when I tap it with my fingernails. Inside is what its designer calls a "short horn," which appears to harmlessly disperse back-cone energy while adding energy below the driver's cutoff frequency. Mainly, though, it's a perfect Herb speaker because it is naturally phase coherent. And sparkplug fast. And completely unmuffled.
This speaker I'm describing is Voxativ's new Hagen2 Monitor. To say it is a "Herb speaker" is to distinguish it from a John, Jason, or Kal speaker, or even a Ken or Alex speaker. If you want to know what kind of sound an audio reviewer values, notice which speakers they embrace, how well they understand them, and how long they stick with them.