1-in-4-out Stereo Audio Amplifier Amp Signal Distributor 1 Channel Input 4 Channels Output RCA Interface Independent Adjustment for Home Speakers - Walmart.com
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
RDL SF-BNC2 Bidirectional Unbalanced Stereo Audio Network Interface, Dante | Full Compass Systems
Ultimate Guide to Audio Output - Headphonesty
5 Input 1 Output / 1 In 5 Out Hifi Passive Audio Input Signal Selector Source Selector Audio Signal Switcher Box Signal Splitter - Home Theater Amplifiers - AliExpress
2 x 3.5mm Stereo Input to 8 x 3.5mm Stereo Output Splitter / Switch - PI Manufacturing
Simple Stereo Input and Output Setup
Rolls SS412 Passive Analog Stereo Audio Source Selector SS412