Amazon.com: Poyiccot RCA Splitter Male to Male Cable, RCA Y Splitter 1 RCA Male to 2 RCA Male Stereo Audio Subwoofer Cable, 2RCA to 1RCA Bi-Directional RCA Y Adapter Cable - 25cm/10inch :
QED Performance Y-SW Adaptor
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Amazon.com: RCA Y Splitter, 2 Pack RCA Female to Dual RCA Male Cable Splitter Adapter, 8 Inches Gold Plated Audio Cable Cord for Subwoofer : Electronics
subwoofer Y-adapter quality and signal attenuation | AVS Forum
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Amazon.com: RCA 1 Male to 2 Female Audio Speaker Y Adapter Splitter Cable with OFC Conductor Dual Shielding Gold Plated Metal Shell Flexible PVC Jacket - 2 Pack / 0.6FT : Electronics
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Amazon.com: 2 Pack RCA Splitter 1 Male 2 Female, RCA (M) to 2 RCA (F) Stereo Audio Y Adapter Subwoofer Cable (Silver) 1 Male to 2 Female Y Splitter Connectors Extension Cord
Soldering RCA Connectors | Making an RCA Y Splitter Cable - YouTube
Subwoofer Splitter Y Adapter Cable
Subwoofer Audio Cable 1RCA to 2RCA Y Splitter Cord Lead SC9506s | Selby
Subwoofer Splitkabel - 0,2m Splitkabel subwoofer med 2 indgange