Dunlavy SC-IV minus SC-I = a good sub?

After an ear-glazing day at the Stereophile show in 1994, I landed in a room with Dunlavy SC-IVs, and right away felt they were the best thing I'd heard, just sounded good. I ended up hanging out there a long time.

I'd like to try some Dunlavys though I'll never get to audition any here in the desert...and see used SC-Is are quite reasonable (and shippable).

Clearly they won't have the bass of an SC-II, III, or IV. But to what degree would a sub make up any differences? Would the SC-I plus a sub give me a good sense of how larger Dunlavys might sound?

Thanks for generously sharing any thoughts.