Man, I'd love a huge room. As an earlier poster suggested, you should try
to take advantage of the benefits. I don't like overdamped, dead sounding
rooms. And the fact that the ceiling is that high may help if you could
suspend some appropriate diffusion- almost like open wood frame 'cells' in
a matrix (think honeycomb, just not necessary that shape of cell) or slats.
The
same width/length may be problematic, but that could be rectified by
erecting something that functions as a freestanding partial wall behind you,
perhaps even partly used as vinyl or media storage if you were inclined. Or
flip the set up around, so that fake 'back' wall and the front wall are the
sides. See below re the glass windows issue, which could then be the front
and back walls if properly treated. In effect, you could create an acoustic
environment within the larger room.
There are good people who know acoustics, know how to measure, but I'd
be reluctant to let someone loose on heavily treating that room until you
know what you have and how to take best advantage of it. What are the
walls, ceilings and floors made of? You'll obviously have to deal with all the
glass, but the right window treatment (and perhaps not even 'acoustically
endorsed' but along the lines of those heavy curtains used in theatres)
could work. Too bad there's no way to show us a picture or three, unless
you set up a system page and post the pics there. I'd love to see the room.
I'm not going to advocate any particular equipment to you. The best
sounding room i had so far, not nearly as large, was in an old brownstone,
very high ceilings, real heavy plaster walls, very wide old plank flooring.
The room sounded marvelous on its own with minimal treatment.
