4x1 Stereo Audio Selector Switcher w/ IR | ANI-AV, Inc.
Hosa SLW-333 Audio Switcher | Hosa Cables
Amazon.com: TENEALAY 4-Way 3.5mm Stereo Audio Switch Input Signal Source Switcher Selector Splitter Box with line Volume Controller (4 in 1 Out / 1 in 4 Out) -MC41 : Electronics