That is an interesting description, but I think that you can take it only so far. Otherwise, you would NOT see the really big speakers that bands, civic centers, etc. have.
I'm not sure anyone would call the PA systems used in large concerts audiophile quality! Seems to me that are more interested in speaker efficiency, low base, and impressive (to teenagers) looks!
The advantages of multi drivers in speakers is well understood in high-end audio. Cerwin-Vega not withstanding, most high end speakers have gone this route.
