Dialog clarity is best with a speaker that has quite restricted frequency response, and therefore is lousy for music. For music you should have a center speaker that matches the Left and Right speakers, and use of a dialog speaker, alas too common, is the reason why some folk think that center speakers are a bad idea. So the solution is to have two center speakers, switched in and out as appropriate. The dialog one could be cheap.
Actually, I suppose it would be possible to make a good wide range music speaker with a built-in switchable circuit to alter its response for dialog use.
Actually, I suppose it would be possible to make a good wide range music speaker with a built-in switchable circuit to alter its response for dialog use.