@mglik: A viewing of Danny Richie’s latest GR Research Tech Talk video on YouTube, in which he goes through his appraisal of the pair of Focal Aria 906 a customer sent him, will be informative.
It’s easy to find: go to YouTube, do a search for GR Research, and a row of his many videos will appear. The Focal Aria video is the most recent, and will be first in line.
Danny shows the Aria’s drivers and enclosure (he has already disassembled the speaker), it’s measured on-axis and off-axis frequency response, its spectral decay characteristics, and examines and describes the speaker’s crossover. He then explains the reasons for the Arias performance failings, and how he addresses them. He not only modifies the crossover to improve the Aria’s measured performance, but uses better parts in doing so. He explains the benefits in sound quality the better parts afford.
As with all Danny’s Tech Talk videos, it is a short (13:21) and sweet look into loudspeaker design and build. You will be VERY glad you watched it!