That is awesome! I moved out 140s to get my 250s and you know, I still miss them. That mid is simply incredible for jazz...Miles was in..the...room. They represented one of the last true 'hi fi store' JBLs built before big box stores and home theater changed things forever. Beautiful cabinets, matching stands, premium crossovers and internal Monster cable wiring even. They are the best JBLs that no one has ever heard ( or heard of).
I don't know how or why but the 140 could hit lower bass notes than the big brother 160. It just couldn't play them very loudly as there is only so much an 8" driver can do.
If a set of 200s ever appears near me....it's gonna force a difficult conversation with the missus
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jblnut