Amazon.com: 20ft - 3.5mm Male Stereo to Dual 1/4'' Male Mono Y-Cable for Phone/MP3 to Mixer : Musical Instruments
Switchcraft 318 AudioStix 3.5mm Stereo to XLR Mono A/V DI with Volume Control
Kentek 6 Feet FT 3.5mm AUX auxiliary male to Mono RCA male M/M cable cord stereo audio for PC MAC iPod iPhone MP3 car monitor - Walmart.com
How to convert STEREO audio files to MONO in batch, using free software - Freewaregenius.com
Antique Radio Forums • View topic - MP3 to Mono Tube Amp?
Audio Spectrum from Stereo to Mono - Windows - Audacity Forum
Amazon.com: HOSONGIN 3.5mm to Dual 1/4 Cable, 3.5mm 1/8 TRS to Dual 6.35mm 1/4 TS Mono Breakout Cable Y Splitter Stereo Cable Cord Compatible with Smartphone, iPod/MP3, Tablet, PC, CD Player, Speaker -
GENEMA Air RA200 Aviation Pilot Headset with GA Dual Plugs Stereo Mono Switch MP3 Music Input Noise Reduction Includes Headset Bag Gel Ear Seals Cloth Ear Covers - Walmart.com