Ribbon midrange pros and cons

Thanks @rauliruegas for that info. I think I’m one of the few planar loudspeaker lovers who never heard a pair of Apogees. For some reason they didn’t seem to be big on the West Coast; I never saw a pair in any California hi-fi shop, Northern or Southern.

I have a pair of the Magneplanar Tympani T-IVa, which have the great Magnepan ribbon tweeter. I also have the ridiculously-overlooked and under-appreciated (not by all; they got a great review in TAS, and VPI's Harry Weisfeld loves them) Eminent Technology LFT-8b, which has a ribbon tweeter and magnetic-planar midrange (180Hz-10kHz, with no crossover!), with push-pull magnetic structure. Best deal in planar loudspeakers, $2499/pr.

None of you have heard of the long-discontinued Apogee full range ribbon loudspeakers?! Three way, all three drivers (bass, midrange, tweeter) being true, pure ribbons. They remain the all-time favorite speakers of some. Very hard to drive---their impedance dropped below 1 ohm, and were very insensitive/inefficient, and were therefore commonly paired with Krell amps. And they were pretty expensive.