Just checked the specs! No +/- with freq range, but still, the speakers are 300-15Khz while the sub is 60-180hz... What happens if you have music using 180-300hz!!!
This doesn't seem to be a problem for B(l)ose. Why should it be an issue for these guys?
In all seriousness, the guy who buys these speakers is not buying them because of their fidelity. They will be bought only as show-piece curiosities for folks with too much disposable income. True audiophiles with enough cash to afford them will look elsewhere.