hardware - Does professional quality stereo to mono conversion require a special adapter - Sound Design Stack Exchange
$4.99 - Female Stereo to Dual Mono Male 1/8" Adapter - Tinkersphere
Kentek RCA mono male to RCA RW female M/F Y adapter converter connector for audio stereo TV system - Walmart.com
Switchcraft AudioStix Stereo 3.5mm Female to Balanced Mono 318
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 :
MONACOR SMC-1 Stereo-Mono-Converter
3.5mm Stereo Jack to 3.5mm Mono Plug Adapter - HamiltonBuhl
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
3.5mm Mono Plug to 2x3.5mm Stereo Jack Adapter
Amazon.com: Monoprice 107128 3.5mm Mono Plug to 3.5mm Stereo Jack Adaptor, Gold Plated : Everything Else
2-Cond Mono female Jack to 3-Cond Male Plug Stereo Adapter
3.5mm Stereo Male to 3.5mm Mono Female Adapter (TAA Compliant) | Audio Adapters and Couplers | Adapters and Couplers | Audio Video
3.5mm Stereo Female To 3.5mm Mono Male Adapter #957 - YouTube
Stereo Mono Converter | 20 Audio System Home | Audio System 8 1 | Audio Adapter - Stereo - Aliexpress
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
Poyiccot 1/4 Mono to 3.5mm Stereo Adapter, 3.5mm to 1/4 Adapter Cable, 1/8 to 1/4 Splitter Cable, 3.5mm 1/8 TRS Female to Dual 6.35mm 1/4 TS Male Stereo to Mono Y Splitter Cable, 20cm/8inch
Stereo Mono Audio Converter Box | Stereo Mono Adapter | stereo mono mixer - Home Theatre System - Aliexpress
C2G 40634 3.5mm Stereo Male to 3.5mm Mono Female Adapter, TAA Compliant, Silver
Hosa GPM-179 Mini Stereo to Mono 1/4 inch Headphone Adapter | Sweetwater