It's not just the electric cord, either. It's the wall plate. Receptacle plate interference. Thankfully Furutech has solved the wall recepticle plug-in plate interference problem. Only $160.00. Carbon fiber with nano crystals (it says here).
After a multitude of tests involving the best in damping materials, Furutech brings you its masterpiece. This combination of carbon and NCF will be the final touch to your complete AC chain. Nano Crystal² Formula (NCF).
Incorporated into selected Furutech products, NCF features a special crystalline material that has two 'active' properties. First, it generates negative ions that eliminate static. Second, it converts thermal energy into far infrared.