Play your stereo music into a mono amplifier with this easy project! - YouTube
Stereo to Mono DIY cable to connect music player / iPhone to tube radio. - YouTube
Amazon.com: XMSJSIY 1/4 TRS Speaker Bare Wire, 6.35mm 3- Pole Male Mono Stereo Audio Cable Replacement Open End OFC HiFi Speaker Cord Amplifier Patch for DJ Microphone Subwoofer Mixer Wire -2m :
Amazon.com: 3.5mm 1/8'' Mono/Stereo Male Plug Female Jack Connector 2/3/4 Pole Pin AUX Extension Wire DIY Audio Headphone Repair Cable 30CM (Color : 4Pole Female, Size : 5Pcs) : Electronics
Stereo to Mono Conversions | brashleraudio
The Stereo-to-Mono Summing Cable That No One Makes | Late Reflections – the Silent Sky Studios Blog
RANE Commercial - Knowledge Base
2.5mm Audio 2.5 MONO Stereo Male Plug Jack DIY Solder Headphones Connector Cable | eBay
1m 3.5mm Stereo Plug to 2x Mono Jack Adapter Cable AUX Audio Line Splitter Lead | DIY at B&Q
What happens when you cross stereo and mono cables and jacks (stereo, mono, sound)? - Quora