If you want to connect an unbalanced RCA to a balanced XLR you would be better served by putting a DI in between the DDJ RCA and the whatever XLR you are connecting it to. The DI will convert the unbalanced RCA signal to balanced. Using RCA to XLR cables has the potential to introduce noise, even on a short signal path, that would be unpleasant at best and unlistenable at worst.