FosPower RCA Y-Adapter (6 Feet), 1 RCA Male to 2 RCA Male Y Splitter Digital Stereo Audio Cable for Subwoofer, Home Theater, Hi-Fi - Dual Shielded | 24K Gold Plated - Walmart.com
10 Pin Universal RCA Output Wire Harness Aux in Subwoofer Cable Adapter Wiring Connector Android Radio Car Accessories|Cables, Adapters & Sockets| - AliExpress
Subwoofer Adapter | RCA Male - 2x RCA Female | Black