Supra Cables Y-Link Subwoofer Cable (1 RCA - 2 RCA)
Subwoofer Cable Splitter, 2 Pack RCA Female to Dual RCA Male Y Splitter Cable Adapter, 8 Inches Gold Plated Connectors Audio Cable Extension Cord RFAdapter for Subwoofer Splitter : Amazon.ca: Electronics
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
RCA Y Cable - RCA Mono Male to Two RCA Stereo Female - Dedicated Audio
Amazon.com: JORZOR Audiophile RCA to 2RCA Subwoofer Cable,1 RCA Male to 2 RCA Male Audio Cable RCA Y-Adapter,Oxygen-Free Copper,Nylon Braided Jacket (1M(3.3FT)), RANHANG1 : Electronics
Ataudio Hifi Single Rca To Dual Rca Subwoofer Audio Cable Pure Copper One Sub-2 Splitter Y Rca Cable - Audio & Video Cables - AliExpress
Subwoofer Audio Cable 1RCA to 2RCA Y Splitter Cord Lead SC9506s | Selby