1st part having them about 1 week in my possession.
1st part, because I have the feeling that it is too early to give a final opinion about them.
They do not sound harsh in the high frequency, which is certainly nice. But, for some reason I have the impression that they there is some kind of boxiness. You get a clear and well positioned reproduction for instruments and vocals which are mixed to the centre. But signals which are panned to the left or right have the tendency to 'stick' to the speakers... They do not become totally part of a 'detached' sound field. I added spikes underneath them and put them on massive concrete stands because I know, out of earlier experiences, that this improves definition. But not now... It might be that both the drivers, electronics and the amplifiers need some time before they show their full potential. I tend to believe that this the case for these JBL's (although I did not read this in reviews). To be seen...
RMC is a nice feature which indeed improves the reproduction in the low frequency areas.
Overall first impression is positive but I'm not totally convinced... yet.