Problems with interconnects

Hi

I upgraded my interconnects from Silver Sonic BL-1 series ll to Actinote MB 130CM. Right from the start I got this distortion that increased with volume It was almost a shrill. I reconnected the Actinotes and it stopped, but I don't hear any sonic difference between the interconnects. Could it be that my player, a Marantz 8400, is not good enough to appreciate the better interconnects? I have heard these cables on other CD players with the same amp and they make quite a difference. Or is it possible that I have faulty cables? Perhaps there is another explanation? My amp is a Audiomat Opera ( this amp was built with Actinote in mind so I know the amp is not the issue).