Audio2000s Adc2117 5ft. RCA Subwoofer Audio Cable The conductor is stranded with silver-plated PCOCC (Pure Copper by Ohno Continuous Casting process) copper wire for signal transmission fidelity. The conductor is coated with foamed PE for a insulation layer with low capacitance. A conductive PVC layer achieves a 100% shielding coverage which prevents both EMI and noises from mechanic vibration and twist. Highly pure oxygen-free copper (OFC) is braided as shield to achieve a shielding coverage greater than 95%. RCA plugs of highly pure copper enhances signal stability to achieve low VSWR (Voltage Standing Wave Ratio), less than 1.1 at 200MHz