Using a Speaker Selector Switch for Whole Home Audio | AV Gadgets
4 IN 1 OUT RCA input Source Selector Signal 4 ways Audio Switcher Rotary switch | eBay
Premium 4 In 2 Out Audio Input Output Routing Switch Selector
6 Way Professional Audio Selector Switch box at Nexxia
6 Input 1 Output Switcher Audio Source Selection Switcher RCA Audio Input Signal Selector Switch with Volume Adjustment and Manu|KVM Switches| - AliExpress
Fosmon Technology 4-Way Audio / Video RCA Switch Selector / Splitter Box & AV Patch Cable for Connecting 4 RCA Output Devices to Your TV - Walmart.com - Walmart.com