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
Sure you could change to bigger louder speakers, but, if I were you I'd experiment with subwoofers to provide the sound you want. Your speakers are fabulous,very hard to beat at what they do, but were designed to be used with subs. Experiment with quality fast subs.
>>03-22-08: Psacanli
Sure you could change to bigger louder speakers, but, if I were you I'd experiment with subwoofers to provide the sound you want. Your speakers are fabulous,very hard to beat at what they do, but were designed to be used with subs. Experiment with quality fast subs.<<

I believe these speakers were designed for smaller spaces, and have already sold them. Besides, I dont believe that the vertical soundstage and imaging would be that much affected by subs. But it's moot.
Post removed 
>>03-22-08: Tvad
Hard to believe, but adding a sub (or two) to monitors has a substantial effect on increased image height and size. Quite amazing, actually...<<

Should I cancel the sale?:):) Are you saying that a recording of content (eg a soprano, violin, piccolo, flute, oboe) well above 60 Hz - an arbitrary cut-off for a suubwoofer - when the subwoofer presumably will not be employed (or will it??) raises the soundstage? What if I tell you that 90% of what I listen to is in the aove 60 Hz range? Then what? I am not being facetious - educate me........