power cords for Pass Labs Amps

Hi, I was wondering if anyone has successfully used aftermarket powercords for their Pass Labs amps. I have the XA160 and was curious if pcs made any difference. I also asked this question directly to Pass technical support and here is what I got back:

"If the power cord is running near interconnect cables then an after market shielded power cord might help. Other wise I haven't seen them do much."

Your response is greatly appreciated.