Give 'em a listen...
and let us know what you think.
I only found the same info you did on the intertubes, which was not much. Does anyone here have the ability to translate chinese?
I have heard Tannoy's, and the one's I heard are quite efficient, but much larger than the ones you have (they had a single concentric driver of about 12" in LARGE cabs, and simply rocked w/ only 5 watts of SET power behind them...gotta love high efficiency speakers!).
Based on that f-audio page, the model you have been offered appears to be more like their current home-theater offerings. Other than that, all I can offer is guesswork. Ley your ears be the judge.