3.5mm to 6.35mm Adapter, Pack of 2-3.5mm Mono Audio Male to 6.35mm Female Mic Plug Adapter Jack Converter: Amazon.co.uk: Electronics & Photo
6.35mm 1/4" TS Mono Male to XLR Male Audio Adapter
Just a PSA for all the peeps with Mono CRTs who don't use external speakers -- make sure you're hearing everything by using an adapter! Thank you 😄 : r/retrogaming
Stagg 1x Mono Jack to 2x Female Mono Plug Adapter Cable - DY Pro Audio
3.5mm Stereo to Mono Adapter – AUX Male & Female Signal Converter Headphone Jack - Loops: Amazon.co.uk: Electronics & Photo
6.3mm Mono Jack Male to RCA/Phono Female Audio Adapter Reviews & Customer Ratings
6.35mm 1/4" Mono Male to 3.5mm 1/8" TS Mono Male Right Angle Adapter Audio Cable | eBay
XLR Male Plug Pins to RCA Phono Plug Mono Audio Adapter
LangRay 6.35mm Mono Plug Male to RCA Female Audio Adapter Pack of 6
Nedis CAGP22934BK Mono audio 3.5mm male - 6.3 mm female adap | Bax Music
kenable 6.35mm Mono Jack Socket to 3.5mm Mono Jack Plug Audio Adapt...
Bolvek 2 Pack 3ft 6.35mm 1/4" Mono Male to 3.5mm 1/8" TS Mono Male 90 Degree Right Angle Adapter Audio Cable Cord : Amazon.co.uk: Electronics & Photo
1m 3.5mm Stereo Plug to 2x Mono Jack Adapter Cable AUX Audio Line Splitter Lead | DIY at B&Q
2-Pack 3.5mm Mono Female Jack to 2.5mm Mono Plug Audio Adapter, AV-A39-2 | eBay