Amazon.com: ZRAMO® Professional Converter Adapter 8 Piece 6.35mm 1/4 Male to 3.5mm 1/8 Female Stereo to Mono Audio Mic Plug Adapter Jack, Microphone Accessory : Musical Instruments
Amazon.com: Stereo To Mono Adapter
Amazon.com: OSD Audio SMC21 Stereo to Mono Converter – Gold-Plated RCA Connections and 1:1 Ratio Audio Transformer : Electronics
Amazon.com: Disino 1/4 Mono to 3.5mm Stereo Adapter, Gold Plated 6.35mm TS Male Plug to 1/8 inch TRS Female Audio Connector - 2 Pack : Electronics
Amazon.com: Maker Hart LOOP MIXER - Portable Audio Mixer with 5 Channel stereo inputs, 3 Outputs via 3.5mm jack. Including a Mono to Stereo DM2S Adapter. : Musical Instruments
Amazon.com: CablesOnline, 6-inch 3.5mm Stereo Female to Dual 3.5mm Mono Male Left/Right Adapter Cable, AV-Y16 : Electronics
Amazon.com: 3ft 3.5mm to Dual 1/4, Stereo to Mono Splitter, 3.5mm 1/8" TRS Stereo Female to 6.35mm TS Mono Male Y Audio Cable, for Speakers, Mixer, Audio, Home Theater : Electronics
Amazon.com: 3.5mm Stereo to Mono Adapter, 2 Pack 3.5mm 1/8" TRS Stereo Male Plug to 3.5mm 1/8" Mono Female Jack : Electronics
Amazon.com: Nady MM-242 4 Stereo / 8 Mono Channel Mini Mixer with mono/ stereo mode, ¼” Inputs and outputs – battery powered, or use optional AC adapter : Musical Instruments
Amazon.com: SPRODIO Single Stereo to Mono Converter, RCA L/R Audio Adapter Stereo to Mono summing Cable Adapter SC21 : Electronics
Amazon.com: ROLLS Stereo LINE to Balance Mono Conv : Electronics
Amazon.com: 3.5mm Stereo to Dual Mono Cable, 6inch 1/8" TRS Male to 2 TS Mono Female Adapter Gold-Plated Connector Audio Y Splitter Cord for Headphone, Speaker : Electronics