I measured the behavior in the farfield of the Focal Chorus 826W using DRA Labs' MLSSA system and a calibrated DPA 4006 microphone. For the nearfield responses I used an Earthworks QTC-40, whose ¼" capsule doesn't present as much of an acoustic obstacle, which can be an issue with port measurements. As Robert Deutsch preferred the Chorus 826W with its grille removed, that's how I measured it, though I left the wire mesh in front of the tweeter in place.
The Chorus 826W offers a higher-than-usual voltage sensitivity, my estimate coming in at 90.1dB(B)/2.83V…