OK doing some resaerch in **wide band* *Full Range* *single source* speakers/drivers.
I remember seeing posts on Audiogon some decades back, about the Coral Beat 8..., Seems these FR came out cerca 1970's sold for ??
So it all began in Chicago and Berlin speakers for the movie industry.
These early prottypes were fantastic in human voice, mids.
I can not find the YT vid of the 1929 Colatura(sp?) made in Chicago, Then we have the Klangsfilm and also Siemens same era.
Zeinth, RCA came along 30's,
Next big manufacturers were Electro Voice and Jensen.
Perhaps Altec Lansing were the next big designs in Full Range,, Lowther, Fostex doing their designs. But its really the manufacturer in japan that really opened the possibilities to these magical designs, Coral Beta 8, CB10.
I think CB8 was the new crown jewel of a long history in this wide band design.
WE also should not over look Tannoy/s *concentric* ideas But I think Coral Beta has surpassed everyone in this field at that time, 1970's.
seems AER, Cube, Voxativ bases their designs upon this magneficient Coral Beta 8 **wonder speaker*
I think the Coral Beta 8 was as good as it gets as far as complete total midrange in the concern.
AER, Voxativ both have been around now over a decade. Yet rarely mentioned. Cube has recently made some interesting designs with a high powered Nd magnet motors.
Fostex, Mark Audio, Tang band come in with lower priced offerings , all have a good fan base in asia.
The most recent *new kid on the bloack* is Davidlouis with their VX8 and VX6, both offered in the year 2020.
I did catch a pic of the early prototype. Completely different , far superior design.
Where these FR drivers are headed is anyones guess.
More futher developements??
Don't count on it.
Looks like each manufacturer has settled in to what they feel is best they can offer.
(Aplogies if I left ZU out the discussion)
xover/low sensitivity types just keep on keeping on,,, new/better/the latest, the hottest..
Stereophile's latest issue,,, yep you guessed it, The Wilson,, just one mo time.
Sorry not interested.
The Seas Thor xover/low sens design was quite enough.
To my ears I hear all xover.low sens designs sound as *the same speaker, dif flavor* variations on a theme. A theme that 's like a ,,, excuse the pun, how could I resist,,A Broken Record.
tongueincheek