About The Hosa STP-201RR. 1 x Hosa STP-201RR. Connector(s): Right-angle 1/4 in TRS to Dual Right-angle 1/4 in TS. Length: 1m. Oxygen-Free Copper (OFC) conductors for enhanced signal clarity. This cable is designed to connect a channel insert on a mixing console to an effects processor with unbalanced phone jacks.