AVS Forum Special Member
Join Date: Jun 2005
Location: Northern, VA - Washington, DC
Mentioned: 102 Post(s)
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Be aware that these things don't 'scale' 4K. EDID tells the cable box what resolution to use and then the source will internally change the output resolution to what is accepted at the display.
Devices are, more and more, becoming friendly with changing their resolution on the fly and adjusting to EDID requests, but it's not a guarantee of reliability by any means.
The biggest issue is that 1080p "I don't support nothing!" television. Any 4K sources must not only scale down, but if they have authenticated HDCP 2.2 and that TV only supports HDCP 1.4, then it will need to reauthenticate, if it can, at the lower copyright mode.
I tend to live in a 1080p world in my home, expect my projector which has dedicated 4K sources. It is the only way I've been able to get things to work right.
Oh, and I'm using a $10,000 16x16 Crestron matrix switch. So, it's not an easy task to get done what you are asking for.
AV Integrated - Theater, whole house audio, and technology installation in the Washington DC metro area.