Amazon.com: Headphone Y Splitter Adapter for Music Sharing Auxiliary Cable Extension Male to Female 3.5mm on Phone,Tablets,Mac and More 3.9 Inch (Black) : Electronics
JL Audio Marine Y-adapter Cables 18" long (1 female RCA to 2 male RCA) at Crutchfield
RCA Plug to 2xRCA Jack Adapter - Y-Adapter
RCA Y-Adapter 1-Male to 2-Female, 1-Femal to 2-Male – OMNI12
5-WAY SPLITTER Y ADAPTER 2 PIN WP STYLE CONNECTOR
3.5mm Male Stereo Females Y Cable | Computer Cable Store
DOWN4SOUND 1-FEMALE TO 2-MALE RCA Y-ADAPTER / Y SPLITTER - Down4Sound Shop