Back in 1973 Motional Feedback was considered a revolutionary product, way ahead of it's time.
After some 40+ years one wonders what MFB could be capable of when combined with modern technology.
The products below are the first steps into finding the answer to that very question, and yes,
the first results are amazing.
... is a question I get with some regularity to which my answer so far always was why  because anyone even slightly familiar with MFB low note reproduction knows that one doesn't need no bloody subwoofer.
Sure, but my 100 square meter room would really benefit from a bit more SPL, can't you do a 12 inch Grown/Up ?? Also, a friend has planars which could really do with some extra bottom.
Ok, let me have a look if I can find a solution for you, ah, found one !