Maggie 1.7i vs 1.7 (what was changed??)

anyone know, factually? wendell seems rather coy about disclosing, which is rather disappointing

i got my set of 1.7i’s (on magna risers) - these modern versions are just terrific

it has been since 1990 that I have had maggies (3a’s back then), so nice, so much fun, so wonderful to be listening to them again (and probably set up right this time around, in a proper room!! 😆)

anyhow, anyone know what was changed going to the ’i’ model?  there is mention of crossover improvements as i research the topic... but nothing specific or concrete