I am using Audioquest King Cobra interconnects
The King Cobra uses silver-plated connectors (XLR/RCA) and this can definitely make the highs have a bright edge and can reduce the thickness in bass and midbass. I would recommend looking for a cable that uses pure copper and gold-plated connectors, such as the Audioquest Red River series. If you want to move up to more expensive cable, Purist Audio Design and Transparent Audio make some excellent cables.