Interesting. Can you give some examples so we have some ballpark idea of what you're talking about?
From the old world, English, vintage style you would anticipate a Shindo-esque glass of bourbon with molasses on chocolate layer cake on a cold winter night.
In the context of an overall warmish total balance, with full and realistic midbass power, the speaker exhibits a wide band frequency response, with contemporary low frequency extension and, with the plasma tweeter, contemporary high frequency extension.
With transparent and resolving associated components, the speaker, which might have a reputation of not exhibiting the last word in transparency, comes off incredibly transparent. On Chopin Concerto No. 1 -- Ballades JimFord and I and an honored reviewer guest heard piano reproduction the realism of which none of us thought the speakers capable. It was the second best reproduction of piano I think I have ever heard, second only to the Tune Audio Avatons in Munich (about which David Chesky said contemporaneously to Herb Reichert that it was the most realistic reproduction of his own recording of his own piano playing that he had ever heard).
Jim had no idea his system was capable of that kind of realistic piano reproduction. Comparing the same track on my reviewer friend's system later that night, we both agreed that the percussive impact of the Tannoy's horn-loaded 15" driver created superior dynamic realism (although ultimately not greater low frequency power and extension), and more believable in-the-room presence and "aliveness."
I think that vocals on planars exhibit a smidgen more transparency and believability, but the fact that I am not sure of this tells you how transparent is Jim's system.
The system could do it all: boy with guitar, power jazz, big symphony orchestra, delicate jazz, classic rock. Just when you wonder if the system is capable of achieving great believability on some particularly difficult track, the system fires a bull's-eye (or at least hits the "9" ring).
Finally the system does this with no hint of fatigue. We could sit there all day and all night long. I think I have visited JimFord about six times now and I literally do sit there all afternoon or all night or both.
The Tannoy does not have the sonic grandeur of vertical scale that the very tall speakers have. It has holistically integrated low frequencies, but it doesn't have the battleship cannon power of a phalanx of four 15" subwoofers per channel.