Amazon.com: HOSONGIN 1/4 inch TRS Stereo Splitter Y Cable 1.6Ft, 1/4 Inch 6.35mm Stereo Male Plug to Dual 1/4 Inch 6.35mm Female Jack, Black Aluminum Alloy Shell Gold Plated Plug Socket : Electronics
Jex Electronics LLC > Connectors & Adapters > 2-way Audio Headphone Splitter Male 3.5mm 1/8" to 2X Female 6.35mm 1/4" Stereo Jack Gold Plated
Gold 2-way Headphone Splitter Adapter 1/4" 6.35mm Stereo Male jack to 2X Female | eBay
Livewire Essential Headphone Splitter 1/4" TRS to 1/4" TRS Female Black 6 in. | Guitar Center
PRO 6.35mm Stereo Splitter Cable 1/4" Plug To 2 x Jack Socket Headphone Adapter 5055538111297 | eBay
Black Dragon 1/4" Headphone Splitter Cable
HOSONGIN 1/4 Inch TRS Stereo Headphone Splitter Y-Cable 1.6ft 6.35mm Stereo Male | eBay