Originally Posted by Mzeb
First, excuse me for my language, i am dutch :-) Hope you guys can help me out. I am about to buy a RX-V781, right now i have the RX-V781581, but i need a second HDMI-out because of a beamer.
Question 1: My TV (Samsung) is 4K and my beamer is 'only' full HD (Epson). I want to feed the RX-V781 with a BD-player, a mediaplayer (DuneHD) and an XboxOne. When i will watch a movie i'll switch off my 4K TV. The beamer will show the image (i hope) and the receiver will play the soundtrack. The XboxOne will probably give no image on the beamer because of the 4K signal, right? But will there be any problems at all because of the fact that te TV is 4K and the beamer can only handle 1080p? I have heard that some dual HDMI receivers don't show 4K anymore on the TV or try to send a 4K signal to the beamer because of the feedback the TV gives to the receiver and so on..
By 'beamer', I assume you mean a projector. And yes, I also have read reports that connecting a 4K and a 1080 display to dual HDMI outputs will cause some problems because of HDCP. What I would try is to buy a small inexpensive 1x2 HDMI distribution amplifier from Amazon or somewhere like that, connect its input to your current Yamaha's HDMI output, connect the two outputs to your two display devices, and see what happens when you turn on your display devices one at a time. You may find that a 1x2 distribution amplifier, or 1x2 HDMI switcher will solve your problem and you don't need a new AVR.
Question 2: The RX-V781 can handle Dolby Atmos. I want to plug in all 9 speakers plus a sub (maybe a second sub), but i believe this receiver only can play Atmos in a 5.1.2 setting, no 7.1.2.. What will happen if i have a pair of surround back speakers and also a pair of ceiling speakers (presence) and i play a movie with a regular (non-Atmos) soundtrack? Will the ceiling speakers be silent and the surround backs will work? I mean, do these speakers switch in use depending on the disc being played (Atmos or non-Atmos). Like the ceiling speakers will work with an Atmos-dics but the rears will be silent? And if so, will they switch automatically when something else is played without Atmos? And - last but not least - is there an option to play all speakers in surround (surround back + ceiling speakers), like when i am watching TV?
The 781 has seven amplifiers, and so can drive a maximum of seven speakers (5.1.2 for Atmos). If you connect nine speakers and select the surround back and presence height configuration, the AVR will automatically determine which speakers to drive depending on what you are sending it from your source material. Regardless, only seven speakers will ever be active at a time. You cannot have all nine speakers working, ever.
Yamaha has all its manuals online (on the U.S. site at least), and you can download the PDF and look through it for amplifier/speaker and HDMI connections to see if it suits you. There may be some differences in the hardware between the American and Dutch versions of the AVR as well, so try to get the manual for the version you are thinking of buying.