Amazon.com: 4x4 HDMI 4K HDR Matrix Switcher 18GBPS Ultra YUV 4:4:4 HDCP2.2 60Hz HDMI 2.0B Doby Atmos HDTV Routing SELECTOR SPDIF Audio CONTROL4 Savant Home Automation Switch IP RS232…
Video Wall Controller 4x4 | HDMI Matrix | Siig
AC-MX-44HDBT 18GBPS True 4K60 4:4:4 4x4 Matrix w/ Digital Audio & Balanced Audio Out, Built-in 4K Up/Down Scalers, and On-Board Audio Delay Control. Cascade, up and down scalers built-in, Digital and Balanced