ADI-2 DAC FS Stereo RCA to Single RCA Subwoofer (Page 1) — ADI-2 & 2/4 Pro series, ADI-2 DAC series — RME User Forum
SPRODIO Single Stereo to Mono Converter, RCA L/R Audio Adapter Stereo to Mono summing Cable Adapter SC21 : Musical Instruments - Amazon.com
RCA (M) to 2 RCA (F) Stereo Audio Y Adapter Subwoofer Cable (24k Gold Plated) 1 Male to 2 Female Y Splitter Connectors - Walmart.com
Subwoofer split cable (Y-split) | AV-Connection
RCA Audio Splitter RCA Y Cable Adapter Cable 20cm RCA to JACK Cable 1 Male to 2 Female RCA Cable for Subwoofer Phono AV Audio Car Subwoofer (RCA Y Cable, 2 Pieces, Blue)