Front-horns like the Duos are a way to get the dynamics you're missing but so are back horns - Cain & Cain, Carder, Lamhorn, Beauhorn, etc.
These designs retain the coherence of the single-driver but add the dynamics of a horn - though they're not really as dynamic as a front-horn system.
The weakness of front horns is that they do require multiple drivers and some room to gel. And the big Achilles heel is bass integration since bass is usually dynamic - this is a real problem with the Duos. (Now, it can be done, and sound great, but it appears it's hard.)
These designs retain the coherence of the single-driver but add the dynamics of a horn - though they're not really as dynamic as a front-horn system.
The weakness of front horns is that they do require multiple drivers and some room to gel. And the big Achilles heel is bass integration since bass is usually dynamic - this is a real problem with the Duos. (Now, it can be done, and sound great, but it appears it's hard.)