AudioQuest Big Sur RCA Male to RCA Male Cable - 4.92 ft. (1.5m)COLD WELDED GOLD PLATED PURE PURPLE COPPER RCA PLUGS: This plug design allows for a connection devoid of solder, which is a common source of distortion. Because the ground shells are stamped instead of machined, the metal can be chosen for low distortion instead of machinability. Purple Copper offers a cleaner, clearer sound than the nickel plated or OFHC metals commonly found in competing manufacturers plugs.