The X5's work very well with Cherry amps, better than all the other class D's I tried. Clean, quiet, very neutral sounding, and terrific bass. I have both the Cherry King Desktop Maraschino monoblocks and a Modwright KWH 225i hybrid integrated, which is my primary amp.
It is worth noting that the X series sub amp's input is also driven from the X's primary speaker terminals, which are connected to your main amplifier, so there may be some sonic carryover there.