C2G 6" Velocity Two RCA Stereo Male to One RCA Mono Female 29122
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3.5mm Stereo Male to RCA Mono Female Audio Adapter,silver - Walmart.com
3.5mm Stereo Male to RCA Mono Female Audio Adapter (TAA Compliant) | Audio Adapters and Couplers | Adapters and Couplers | Audio Video
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Earphone Audio Jack 3.5mm Connector Stereo Adapter Male Female RCA Audio Mono Channel Plug to Screw Terminal Mono Channel Plug - AliExpress
Rolls DB226 Stereo Line to Balanced Mono Converter DB226 B&H
Cordial Cables Y Adapter - Stereo 1/8“ TRS Plug to L/R mono RCA, 3-Foot Black Cable | Musical Instruments and Accessories | Z String Music
RCA Mono Male RCA to Two Female Stereo Adapter Y Cable - 6" - EACH - Dedicated Audio