audio - How to switch between headphones and speakers without disconnecting - Unix & Linux Stack Exchange
PC Speakers/Headphones Audio Switch Converter Volume Controller for Switching Back and Forth between PC Audio
LINEPAUDIO Audio Switcher 3.5mm 2 in 1 Out / 1 in 2 Out A/B Switch Stereo Audio Splitter Box with No Distortion 3.5mm Jack for Switching Between Computer Speakers and Headphones - Walmart.com