Which speakers will fill 5,000 cubic ft coherently


In porevious threads I've bemoaned the fact that my Kharma 3.2 FEs don't fill the room, 17 X 23 X 15 ft ceilings with a vertical enough soundstage, as though the speakers are literally too small. I have been advised to raise them,which I have done, , I have told to get taller, line arrays, even given names of custom speaker makers. Any specic recommendations from those that have had, and have conquered, this issue.
springbok10
I've head the Definitions and the top-of-the-line Coincident model, but honestly I don't believe it matters what I think of them. What's most important is that the speakers you consider have impedance specs that mate with your amps. Ask Ralph.
How about Dali Megalines? I've seen them used at 15k, but you will need to biamp and may want to upgrade the Xover. Nevertheless, they will fill your space coherently and are about 10" wide. Check Albert Porter's virtual system here on Agon.
Audiofeil have a pair of Defintions that have an impedance of 30 that are custom made specifically for OTL amps. I'll ask Ralph about the Woodmeres.
Tyler Woodmere have a nominal impedance of 4 ohms, which means they have a minimum impedance lower than 4 ohms.

Atma-Sphere recommends a minimum impedance of no lower than 8 ohms, and preferably not below 6 ohms.