There are many manufacturers that make coaxial cone drivers combined with compression drivers, BMS, Sica, Faital, B&C, Lavoce. PHL, SB Audience, Katesian etc.A compression drive is too large to fit in a coaxial. The voice coil is twice the size as the opening.
The mid/woofer speaker needs to be designed to accommodate it and Genelec's most likely is not but it could be done if they wanted to. For it to make sense the mid and woofers need to be high enough in sensitivity to match.
