recommendations 4 well sheilded ic 4 high pwr amp

any recommendations for well sheilded interconnects to be used between ps audio gcc-500 and gca-500 for biamp setup. i hear some hf noise when using ps audio transcendant. gcc-500 is being used for highs, gca-500 for lows. gcc has no noise, only the gca. too bad there is no xlr balanced output from the gcc to balanced input of gca, otherwise i would not have noise. thought i might try rca to xlr adapter, but don't know if output will be different. any suggestions appreciated.