Amazon.com: Cubilux Bidirectional 3.5mm Audio Switcher (1-in to 4-Out / 4-in to 1-Out), Stereo 1/8” Aux Selector Box for Speaker Headphones/Earphones, Audio Switch for Laptop Computer Smartphone Tablet : Electronics
Bidirectional 1 Channel Balanced Audio to Fiber optic Extender Media Converter, XLR balanced Audio over Optical Fiber SM 20Km
Amazon.com: Cubilux Bidirectional 4-Channel 6.35mm Audio Selector, 1x TRS to 4X TRS Stereo 4-Port 1/4” Quarter Inch AUX Switch Box for Speaker, Headphones, Subwoofer, Home Audio System, Mixer, Amplifier : Electronics
Amazon.com: Cubilux Bidirectional 3.5mm Audio Switcher (1-in to 4-Out / 4-in to 1-Out), Stereo 1/8” Aux Selector Box for Speaker Headphones/Earphones, Audio Switch for Laptop Computer Smartphone Tablet : Electronics
Amazon.com: Bidirectional 2 Port RCA Audio Over Fiber Optic Extender Converters, Two Way, Singlemode Fiber up to 12.4miles (20Km),SC Optical Module for Microphone Broadcasting TV Multimedia and More : Electronics
ROOFULL Optical-to-Coaxial OR Coaxial-to-Optical Digital Audio Converter, ROOFULL Bi-Directional Digital Coaxial to/from Optical Toslink SPDIF Audio Converter/Adapter/Repeater – ROOFULL Official Website
B060 Audio Selector Audio Switcher 4 IN 2 OUT Lossless Bidirectional Switching | eBay
RDL SF-BNC2 Bidirectional Unbalanced Stereo Audio Network Interface, Dante | Full Compass Systems
2 Ch 2 Way Balanced Audio to Fiber Converter with XLR Ports, Full Duplex – Transwan
1 Ch Bi-Directional Balanced Audio Over Fiber Extender with XLR ports – Transwan
Datavideo BAC-03 Bidirectional Analog Audio Converter : MY WAY VIDEO
Digital DSP Audio Matrix with RS-232 Bidirectional Serial Control Interface - China Audio Matrix and Matrix Switcher
Angry Audio Bidirectional Balancing Gadget 2x IHF Inputs And Outputs And 2x PRO Audio Inputs And Outputs | Full Compass Systems
AJA ADA4 4 Channel Bi-Directional Audio A/D and D/A Converter