Hosa DRA-503 Double Shielded 75ohm Coax Cable with Gold Plated RCA Connectors. The DRA-500 series cables are designed specifically for S/PDIF. They are also great for use as a composite video cable. Type: Connector Cables Features: Hosa DRA-503 Double Shielded 75ohm Coax Cable with Gold Plated RCA Connectors. The DRA-500 series cables are designed specifically for S/PDIF. They are also great for use as a composite video cable.