The only reason to use multi-channel input would be to use it as an amp but I would not use analogue for high-resolution audio for two reasons:
1. they don’t invest into AD converters as much as they do in DA converters especially in multi-channel amps so really you’re just degrading the sound.
2. the new yamahas have 64bit room correction enabling high-resolution correction and really great clarity of sound.
this unit sounds amazing but this is the story:
I hooked it up in my studio where my current 3020 is running Yamaha studio monitors and the clarity of sound is just really amazing. HOWEVER, this unit was meant for the main home cinema. Unfortunately, after doing measurements, the room and my THX select 2 laid back bloody speakers are interacting in a way that the Yamaha’s clarity is lost on those speakers and the room.
I had two options:
1. Upgrade my speakers which I have no money to do right now. I’m not moving my white woofer studio monitors to the home cinema. That’s out of the question!
2. Use an old unit with XT32 and correct the hell out of them. Well, this worked and I’m sticking with this. Even tho it doesn’t provide the clarity of the Yamaha and I lost CinemaDSP which I’ll miss.
I’ll get another Yamaha once I upgraded my speakers in the home cinema in a few years. For now, this is the compromise.