Just returned to the lil Pioneers (LS BS 22 LR's) and voila, mids return. Less sparkle but an overall more balanced presentation. Evidently the sparkle that so enthralled me last night was the result of so very few mids. I do understand the slow and thick, polite thing and sometimes that's where I prefer to be. Kind of the opposite of my favorite speakers, my old Rega Elas.
When I get some time, I plan to install the new crossover network developed for the Minimus 7 in these old junked Optimus Pro77's. It was developed collaboratively over on that other audio site but shepherded by a now deceased prodigious poster and JBL fan there.
I've already modded one set of M7's and was quite pleased with the result. Large loss of sensitivity but an overall more refined speaker, once modded. Once modded the M7's are quite nice but not as nice as my little speaker standard, the ADS 200's.
Sorry for the digressions but for a while "sparkle" from the Optimus Pro77s was good to hear.