After 5 hour afternoon listening with monarch, now I think the undisclosed config of Monarch would be
-2EST (super tweeter)
Which explains why monarch could handle so much of resolving capability for string and micro details
I don't remember where (maybe Resolve on the Headphones.com YT channel) but someone said that there were several BAs for the bass. So it was a DD and at least 2 BA for bass, then 2 for mids and 2 for treble. I don't recall it very well who or where, and the exact distribution, but I am sure that there were the DD and several BA just for the bass.