It was actually the X6 sitting right next to the X1’s, which made it even more impressive ($22,000 vs. $5,500). I agree many people were walking up to verify what they were hearing. I get people will be skeptical if they haven’t heard Borresen in person, but they do make good speakers and equipment.
I also get that physics can define what a small driver can do. However, the bass from the M6’s using similar sized drivers were pressurizing the room nicely, and I could feel the low bass quite well.