I just decided to order the Dynaudio 9S to pair with my Kali IN8-V2 monitors in my office. It should go down to 22hz @85dB +/-3dB. Haven't found any measurements yet though. I was also looking for subs that can go down well below 30hz that also didn't cost as much as the KH750 (I paid around $1K for the Dynaudio). And I needed the additional feature of having XLR inputs/outputs.
I'd be happy to try and take measurements of the subwoofer, but all I have is a UMIK-1, and not sure if that's sufficient to properly measure a subwoofer. And I don't have an anechoic chamber in my house![]()
Umik-1 is perfectly fine to measure a subwoofer, both nearfield and in the listening position.