Josef Anton Hoffman, the 'H' in KLH was an audio engineer with a storied career that included working on the Manhattan Project in WWII, after which he returned to school at Harvard where he earned his PhD. In his career, he worked at KLH, AR, and Advent.
Hofmann's Iron Law
"There are three parameters that cannot all be had at the same time. They are low-bass reproduction, small (enclosure) size, and high (output) sensitivity." Hofmann stated that designers could pick two of these three parameters, but in doing so, it would compromise the third parameter.
The Focal Aria 948, with 92.5 dB sensitivity, gives up almost an octave of bass potential for that sensitivity. if were re-engineered to give up 3dB of sensitivity it could probably reclaim bass down to near 40 Hz. The best you can do is locate it closer to your rear walls to increase the acoustic loading. but that may have other tradeoffs you don't care for regarding soundstage and imaging.
