J-Tech DigitalScaler/Multi-Resolution Output (MRO) 18GBps 1x8 HDMI 2.0 Splitter HDR10/Dolby Vision 4K@60Hz 4:4:4 [JTECH-18GSP18M]

I bought this product as I have an older AVR which no longer supports some of the newer video features forcing me to connect other sources direct to the TV. My early generation LG OLED TV does not support eARC and limited the optical output to stereo for some HDMI inputs. I took a new Roku 4800R and used this Splitter and good quality (High Speed\Ethernet) HDMI cables to connect to my TV (using HDMI1 from the instructions) and AVR (HDMI2). I did have to change to "Copy" from the default "Fixed" (which surprised me), but when I did so I was able to again get "Dolby Vision" and "Dolby Atmos" on my TV and full 7.1 "Dolby Digital Plus" input to my AVR. I do see now, that the outside of the box clearly (as opposed to the more cryptic manual) DOES show to use the EDID Copy mode for 4k Dolby Vision support (which makes sense that EDID Fixed is straight 4k 60hz support as that is more generic). As I was successful, I didn't try "Mixed Mode" as it is implied that may not work with Dolby Vision. (There is a note: "Source Devices and ALL connected TVs must support Dolby Vision\HDR 10", so it looks like "Copy" was the way to connect the AVR as in my setup it can disregard extraneous video signals.) The Splitter did its job. The sound is much better and to the expected standard. The video was unaffected (great) on my TV with no noticeable change caused by the introduction of the splitter.

Contrary to the advertising it is not a multi-resolution output scaler. I received this admission from tech support after I was uanble to get it work. It may scale to 1080p under a limited set of parameters but it won't tailor the output to each attached device. In my experience the "Mixed" feature seems to select the lowest common parameters and passes that EDID back to the source. Admittedly my use-case was not common in the consumer device space. My input is 1920x1200 (16x10 aspect) rather than 16x9 aspect.The "Copy" EDID features works well and prevents a problem I've seen with cheaper splitters where attaching or turning on other devices causes a signal renegotiation and disruptoin for all devices. When using the "Copy" feature the source and the "main" output device on port 4 continue to work without interruption regardless of the status of devices on ports 1-3.

This small splitter works exactly as advertised. Using it to fool my ONKYO receiver and get Dolby Atmos while sending video directly to LG OLED from Apple TV4 to get Dolby Vision. Works like a charm.

Good unit, solidly built. I have two concerns with it. It can split between 4k and Full HD, or it can output Full HD (1080p) and HD (720p), but it can't do 4k and HD. Secondly, the power jack is finicky, and if the power cable is bumped, the unit sometimes loses power. Tried a cable and power supply of my own, and it still occurred, so it's definitely the jack that's the issue. Neither of these will be a major concern for me in the long run, but as I was testing and arranging gear, they were small inconveniences.

This is a review and description of a configuration of several video components used together to achieve a couple goals. The goals were to eliminate a cable set top box by effectively cloning all the sources that were previously attached to one of the TVs to the other TV. The second goal was to eliminate the audio lag that previously existed with two cable boxes tuned to the same channel with one of them being a DVR which introduces the lag and a standard box attached to TVs in adjacent rooms.Part of the challenge that this solution had to address was that the main TV is a 4K UHD Samsung and the other TV is a much older 720p Samsung. This mixed mode requires a switch that can handle having two devices with different resolutions.The basic approach was to get the 5 sources into one cable and then have a switch split that one cable out to two televisions.I used the J-Tech Digital HDMI Switch 5X1 [JTECH-18GSW5] to combine the multiple mixed sources into one. I have 4 sources in play and they are a Samsung 4K Blu-Ray, an Arris HD DVR, a TIVO HD OTA, and a Chromecast. I have one port open for another random device that may be used from time to time such as my son's Apple TV when he comes over to visit. I used the HDMI cables that were in use before to connect each of these devices to the 5x1 switch.I connected the 5x1 switch to the 1x2 switch with a new 3 ft KabelDirekt 4K HDMI Cable.The 1x2 switch I have is the J-Tech Digital Scaler/Multi-Resolution Output (MRO) 18GBps 1x2 HDMI 2.0 Splitter [JTECH-18GSP12M]. I have it attached to each TV also with new KabelDirekt 4K HDMI Cables: one is a 3 ft and the other is a 50ft which will eventually be run inside the wall into and across the attic and then down into the wall behind the remote TV.Once I had thought through what was needed, getting all the pieces together was as easy as connecting all the cables as described above. The 5x1 does automatically switch between which ever source is on. If more than one device is one, there is a remote and a button on top of the unit that can be used to switch between the active sources.With this configuration, I can have both TVs on or have either one off and still have use of the sources on the one that is on. Since both TVs are Smart TVs, I can utilize that feature to watch something different on either TV if that is needed to be done.I am quite pleased with the result and would recommend all the components used.