I am playing the Knight myself. Best is to ask Mr. Lars Hansen. I had some questions about my amp in the past and mailed mr. Hansen. Very friendly and helpfull.
BTW the Knight are fantastic, really fantastic loudspeakers.
In the past I have played pass labs x150.5 (playing other speakers that time). I wanted to buy the xa30.5. Pass Labs told me the xa 30.5 has even more capacity to drive speakers than the x150.5 (2*150 watts). On this point of view xa30.5 ought to have enough power.