2x RCA cables, also known as “cinch” cables, are used to carry an analog audio signal in two channels: left and right. It’s worth remembering that a 2x RCA cable is a signal (interconnect) cable, not a speaker cable. It carries a low level line signal, so a secure plug connection and good shielding matter, especially when the cable runs close to a power strip, power supplies, a router, or mains wiring.