It's an intuitive thing once you wrap your head around the filter concept. Of course, another feature unique to ALEMBIC is that with the filter off, you have active electronics without boost/cut as you'd see with virtually anyone else's tone network. Very clean, deceptively so, usually the reason you hear some non-informed two-centers talk about ALEMBICs not sounding very 'bassy'.
And of course with the filters and the blend you can get everything from very lumpy organ-pedals tone, to clavinets on steroids. From just a few knobs and a few switches. Amazing.
Like the man said, there's those who know, and those who think they know !
J o e y