Despite a nasty rattle can paint job, these JBL 4311-A Control Monitors were the find of the day. I pulled a purely low-end-of-the-mid-range Kenwood receiver off the shelf and fired them up. They sound amazing. I am not a "golden ear" but they sound precise and bright to me. Wonderfully, the all paper cone drivers of this era pre-date the miserable foam surrounds that are always rotted out on newer speakers. They work perfectly.
I have been listening to this all day. Really conveys a seriousness here at the shop. The sort of professional atmosphere in which sonatas are required for real work.
Not sure what I am going to do with them as I already have about 4 pairs of speakers. That said, not sure why I had the Kenwood receiver either.
I figure the Presence and Brilliance knobs are aspirational. I set them at 7, as I don't want to appear greedy.