I once had the opportunity, lasting for several years in fact, to use the famous two-way Jamo Concert 8 as a reference, to which I promptly compared all other speakers on the market apart from the most expensive ones. Despite its somewhat controversial upper midrange/treble performance, Jamo's Concert 8 clearly merited its reference status. There's one feature I'll probably never forget, namely how the lower midrange from roughly 200 - 500Hz was executed: it was pure, lean, flat and skinny like nothing else. In some sense, the Concert 8 made all other speakers -- and I do mean all -- sound excessive or fat in that region. It really was that well articulated and polished. I personally liked the feature not least because it supported the music I mostly listened to, i.e. music that doesn't yearn for extra assistance from the speaker's lower midrange register (cello, piano, female voice). Nevertheless, this characteristic proved so overwhelming in the end that although I always considered the Concert 8 one of the good guys, I started to doubt that all other speakers could get it wrong and only this little Jamo right.
Be that as it may have been, I was glad to notice that Jamo had held tight to this character in their new R909 although perhaps not to the same extreme extent as with the Concert 8. This quality makes the sound grey in color and dry in texture. This is easily verified with piano music. If piano is the only instrument you care about and you expect the speaker to reproduce your piano recordings with shine and elevated elegance, the R909 isn't the answer.