Mogami Stereo 3.5mm TRS Male to Dual Mono 1/4" TS Male Y-Cable (3') - MusicMann Studios
Amazon.com: 3.5mm Stereo Male to Dual 3.5mm Mono Male Audio Cable, 1ft 3.5mm 1/8" TRS Male to 2 x 3.5mm 1/8" TS Male Y Breakout Cable Splitter Adapter for Headphone, Speaker :
Dual Mono-Stereo Adapter - Makers Making Change
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Sendt 3 Foot 1/8 inch (3.5mm) Male Stereo to Dual 1/4 inch (6.3mm) Male Mono Instrument Cable
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1/4" Dual Mono Stereo Jack Headphone Microphone Y Splitter Converter Audio Jack Plug Adapter Single Male to Female 6.35mm 6.5mm - AliExpress
3.5mm Stereo Female To Dual 1/4" Mono Male Adapter #27-140-039 - YouTube
Stereo 3.5mm Mini Male to Dual Mono 1/4 Inch Phone Males Y-Adapter Cable 10 Feet