To get the best video as possible you are better off running hdmi from your player straight to your device. Then just connect audio cables or other hdmi (assumin you have dual hdmi outputs on players these days) from player to avr or processor for sound. The 4K pass through on AVRs is more of convienence, but it breaks up signal chain. Not to mention there are hardly any hdmi cables that actually support and pass true 4K and requires very short distance to work. There is a thread on 4K and hdmi cables there too.Ok I have tried everything under the sun to pass 4K from direct tv through the RAP-1580. I have had zero consistency with this issue. I have been forced to bypass the RAP-1580 all together with any video . The lengths i have gone through these past few weeks have been incredible. I first purchased all new hdmi cables. next i got a new direct tv box. then i ended up taking back the RAP-1580 and got a new RAP-1580 . then i hooked up an Altona UHD SYNC . oh wait you guessed it no luck with that either so far. I have never ever experienced such a gigantic headache over something so absolutely simple. i mean simple setup here nothing complex about it. I would love to hear from any other owners of this product to see how they are doing with passing 4k video through this piece. I think this is one firmware update away. but before ya think i didn't update this thing i did that as well . the first unit i did it via ethernet this time i tried doing it via usb. even did the reset once it was updated and entered all the values into the settings again.. but the result unfortunately was the exact same. so at the end of all of this so far all i have to show for it is lack of sleep and a new appreciation of some of the old school ways we used to connect components with trusty analog cables.. this hdmi is less than great as far as i am concerned now .. anyone who has a RAP-1580 hit me up i would love to hear your story with the piece ...oh wait i even used a hdmi snoop program given to me by one of the techs. hopefully the information in those reports will help resolve this issue.. well thanks for getting to the end of this i am venting and desperate for someone to give me the golden nugget to resolve this issue..