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 statement is inacurate. Aria 848 was already rated 37hz -3dB and 31hz -6dBat the claimed sensitivity, unless you are asking for 1dB tolerance which is rarely industrial standard. Usually, the tower speakers with port or other low frequency enhancements are immune from the Iron law.