They are in the range of certain pa products, such as Peavey Escort, or Fender Passport. I think they do a better job soundwise than either of those.
I use the Z2200 some. I've used them half a dozen or so times at the supper club, with around 50 people, and they did fine.
Semilive has played some fairly big jobs with his. Gary has Z5500s he has customized for easy setup.
I actually have two sets, one on my computer, and the other in the van for backup pa.
DonM