Follow up: Well, i just gave it a listen. Clean, detailed sound. Reminded me a bit of Klipsch Heresy with a tad less bass. I suspect the real low end for the 850 is about 75 to 85 Hz down about half. The Heresy is down about half at 65, so meh . . . Both need a sub to get deep bass. But, I hasten to add, the EV Stereon 850 sound better than the Heresy to me. Less dry. More nuanced. A bit sweeter. I know. I know. So subjective! Anyway, I will probably use it as a center speaker and the Heresys as L and R front in a surround sound setup. I expect to kick arse with concert bluerays with this setup. Maybe a nice sub just handling 20 to 60 Hz and some very solid bookshelf drivers for the rear.
If I had two I'd be tempted to just use them in a stereo rig with a nice sub kept low, maybe 20 to 85 or so. As I said, ythese sound like they go below 100. Perhaps 100 is where the coil starts to attenuate them. Or it could even be the half point. But they go lower.
It's too bad more of you cannot hear this sound. The Patricians must be some hellified loudspeakers if this has the same 3 upper drivers because the more I listen them less I find fault with and the more I am falling in love. Really beautriful, powerful, delicate loudspeakers. Just played "some One To Love" mono mix from 45. And Grace Slick's vocals are to die for!