a) Jones designs and gets his own drivers fab'd from scratch.
b) A concentric field coil based driver would be a lot more difficult to design.
If the price looks relatively affordable on his drivers, average audiophiles may come to their senses on how insanely bloated the price of field coil drivers have been with some players out there (vulture price)..A field coil driver is not some magic ball driver... permanent magnet vs electromagnet essentially.
We shall find out soon...economies of scale considered n all!
I've heard, and liked, many field coil speaker systems and individual drivers. I do hope these speakers are not too expensive, but, the price of other field coil speakers make it unlikely that they would be affordable to most people.
The terrific sounding Songer Audio systems with a full range field coil driver costs around $45k for a pair, the cheapest Audio Note field coil speaker is $65k. Drivers from Voxativ range from around $14k to $70k per pair, Feastrix from $6k to $40k per pair and G.I.P. from $20k to who knows what (their best tweeter is $60k per pair). There is also the cost of the power supplies for the drivers.