ATAUDIO HIFI RCA to 2 RCA Subwoofer cable High Quality One Sub 2 Splitter Y RCA Cable| | - AliExpress
Amazon.com: Mediabridge™ Ultra Series RCA Y-Adapter (8 Feet) - 1-Male to 2-Male for Digital Audio or Subwoofer - Dual Shielded with RCA to RCA Gold-Plated Connectors - Black - (Part# CYA-1M2M-8B) :
Subwoofer Cable vs RCA Cable: Which One? — Theirishcurse.com
Monoprice Onix Series Digital Coaxial Audio/Video RCA Subwoofer CL2 Rated Cable, RG-6/U 75-ohm 6ft - Monoprice.com
ATAUDIO HIFI Single RCA to Dual RCA Subwoofer audio cable Pure Copper One Sub 2 Splitter Y RCA Cable| | - AliExpress