4K 60Hz HDMI Matrix Switch 4x4,HDMI 2.0 Matrix Switcher Splitter 4 in 4 Out with coaxial SPDIF Audio 5.1CH, 4K@60Hz 4:4:4 8bit HDR HDCP 2.2,Down Scaler to 1080P,Button,IR Remote,RS232,IP Control

First off, there is no support for this device. No contact information provided.Dolby Atmos requires additional Bitstream decoding of audio tracks by an AVR, however this device only supports Dolby TrueHD and DTS-Master Audio only via PCM. So there is no decoding possible by the AVR.So I do not see how they claim Dolby Atmos support.There is no power off function on this device, on the remote or in the software. It is constantly on.

I've tried several matrix, trying to find one that uses a built-in EDID to tell my Shield Pro 2019 that it's in an ATMOS-capable chain. But this one doesn't work for that. My HTPC works though. And this matrix has a BUNCH of built-in EDID which can be assigned differently to each individual input. So, aside from a compatibility issue with my Nvidia (worked around by using copy-EDID), it's a very powerful device when it comes to EDID handling. On first bootup, it picked up a DCHP address without any pre-configuration. You can use the MicroUSB port on the device to connect via UART, So, connecting to this and managing it out of the box was very easy. I encountered few glitches and would be keeping this if it only switched a little faster. Of all the matrix I've tried, this is the second or third slowest when it comes to blackout during input changes or screen resolution changes. If it had a faster processor in it, I'd have kept it!

Don’t waste your time I have had 2 of these and the outputs to the tv just burn up 2 ports are bad and they didn’t want to exchange it or fix the concern the second time

I own a 8x8 Matrix switch from J-Tech Digital that costs almost $900. I need this smaller 4x4 matrix switch to add to my HDMI device catalogue, as the 8x8 is filling up quickly with all the new HDMI consoles being released.This box meets all the technical standards, and has been reliable for continuous 4kx60Hz since I started using it. No significant heat issues, but my setup has good airflow. I don't use the extra features on this, but the remote works well enough with direct line of sight with the IR window on the front of the box. There is an optional, 59 inch long IR cable extender.The box is small, measuring just under 1 inch thick, 8 5/8 inches wide and 5.36 inches deep including the ports sticking out in the back (not including plug depth).The included power supply has an output of 12.0V and 2.0 amps, using a positive center standard 5.5x2.1mm barrel plug on a 59 inch long cord. It does have a little screw attachment to it to keep it plugged in, but it isn't necessary if you need a replacement from somewhere else. The remote comes with an off-brand CR2025 battery that you need to install.My electronics get very heavy use, so if I find this fails pre-maturely, I will be sure to update this review. Otherwise, I expect it to last for years.

The output I had displayed in 4K looked fine. The outputs that were downscaled to 1080p had a significant loss of color.

Once I foraged around for a while I finally figured out I could connect this matrix switch between multiple PCs and multiple QHD (2560x1440) monitors and get the switching to work. After that it all worked as desired. What threw me off was the EDID settings. At first what I saw was a range of 4k and 1080p options, and neither applied to my setup. It was when I finally discovered the "Copy from HDMI out#" option that I realized I could set the EDID for an input port on the switch to the EDID my monitor connected to output port # was responding to the switch with. I really wish the manual had addressed this case. It's only focused on 4k inputs and possible downscaling to 1080p.I used the switch's network connection capability to manage the switch. It was easy to discover the switch's IP address when it was first connected to the network (I looked at the most recent IP address the DHCP server on my firewall had assigned rather than using the more elaborate procedure spelled out in the user manual.) That enabled me to go directly to the browser-based interface of the switch to do management.Now that things are working I am impressed by how quickly and smoothly this switch switches between sources and outputs. There's about a three second delay when switching inputs for a given output. There are no visual artifacts as the switching takes place. I haven't tested the separate audio stream capability. The switch allows for input of audio streams via SPDIF separate from the HDMI video streams. The big question I can't answer from my testing is whether sync between video and audio is good.Ultimately this switch will be doing rather pedestrian work, switching between 1080p inputs and 1080p projectors connected to the output ports. I'm glad to see that if I am able to upgrade the sources and projectors to 4k in the future that my switch is ready for them.This switch is really well constructed. It's got an all metal case. The manual switches all work well and have a quality feel. The connectors are all solid. The 12 volt power supply line has a threaded ring to ensure the cable can't be accidentally jerked out of the switch. The wall wart has a swappable adapter for different outlet types. I'm impressed.One star off for a user manual that is lousy at addressing non 4k / 1080p input. The switch itself appears to work well. If you go out to look for firmware updates, like I did, you'll find you need to be able to read some Chinese.