yes an HDMI splitter switch will work with the Mag 254
I have experience with the Nexxtech HDMI Switch and the Mag 254
4 hdmi inputs -- 1 hdmi output
Works good with the Mag receiver. The only thing I notice that can be annoying is when you have more then one device powered up and connected to the switch. If the Mag is the one being viewed and it gets a temporary interruption in signal (like a short freeze), then the switch will automatically recognize the other signal from the other device and switch to it. But soon as the Mag re-acquires signal, then the switch automatically switches back to it) or which ever device is currently chosen, from 1 to 4).
I have this avov2 that will not work thru HDMI with this one TV I have. All other android boxes will work with that TV and with the same HDMI cabling (or other cabling too).
That day I was stumped.
That was the day that I bought this Switch.
Now the avov2 does work with this cheapo TV, but has to go thru the Switch first.
So HDMI Switches and androids do like each other (at least all the androids I have here)
Issues with HDMI cabling and the different types or brands can happen, but seldom would there be an issue with HDMI Switches and androids,
I know, I know... a simply yes it will work, would have sufficed