Among the least colored and best integrated horn/high efficiency systems I've heard are the various speakers from Classic Audio that Atmasphere mentioned. These must be in the running. I also endorse the mention, made above, about the top level JBL horn systems.
I like the EdgarHorns as well. These tend to be just a bit less ultra dynamic than some other horn systems, but, the have a fantastically natural and musically satisfying balance. In other words, I like the tradeoffs made by the designer/builder.
I like the EdgarHorns as well. These tend to be just a bit less ultra dynamic than some other horn systems, but, the have a fantastically natural and musically satisfying balance. In other words, I like the tradeoffs made by the designer/builder.