OK, the scoop is that these speakers use the new 5.3 GHz band, but 'new' is a relative term. There have been wireless routers out that use 5.3 for 5 years now, and usage is increasing. The saving grace is that there is more spectrum available in this band than there was at 2.4 GHz, but it is not a silver bullet in the long run. The myriad wireless devices coming out will fill this band in the next 5-10 years much the same way that 2.4 filled.
My advice is to use wired connections wherever possible, and make sure that any wireless solution has fast hopping narrow band xmit AND receive that is adaptive to lock out other frequencies which are in use.