Classe XLR balanced inputs??


I just purchased a Classe CA-200. In reading, I came across the balanced and unbalanced inputs using RCA or XLR inputs. I am new to this high end audio arena and not familiar with XLR and balanced. Does it really sound much different/better and, if so, where can one purchase a set of these to go from the CA-200 to a CP-35?
Thanks.
mariles62