"But what do you think about waveguide's, at least in theory?"
I find directional speakers in general to be an unnatural way to reproduce sound naturally. Some designs do it very well, but to me sound in the real world is largely not directional in nature (save perhaps at a live amplified concert event of some sort).
Having said that, in lieu of having studied waveguide theory in detail, my gut feel regarding waveguides is that they may be a useful approach if done correctly, but as was pointed out the key would be in the execution, which I could only judge were I to hear it. Theory alone seldom describes real world phenomena completely, especially in nit picky areas like hi fidelity audio.
I find directional speakers in general to be an unnatural way to reproduce sound naturally. Some designs do it very well, but to me sound in the real world is largely not directional in nature (save perhaps at a live amplified concert event of some sort).
Having said that, in lieu of having studied waveguide theory in detail, my gut feel regarding waveguides is that they may be a useful approach if done correctly, but as was pointed out the key would be in the execution, which I could only judge were I to hear it. Theory alone seldom describes real world phenomena completely, especially in nit picky areas like hi fidelity audio.