The fact that the device unfortunately only has one HDMI output, is for a home theater with two vision goggles also underwhelming. I - after the firmware update - then finally I have a CSL - bought ULTRA HD (4k) HDMI Splitter and works perfectly today with my instruments.
Prior to the firmware update of the Denon I even a not cheap Kinivo HS420 4x2 High Speed HDMI matrix used by the signal from the Blu-ray player Denon past the grind for Acer projector, without the use of 3D was the Denon am Beamer impossible. These Kinivo matrix is another matter - see my local review.
So the problems are in sum rather in the device combinations randomly chosen - and if you're lucky (as shown below) fixes Denon firmware problems after some time. But when you install the components go hours in troubleshooting, just because a company is not able to bring a reasonably error-free firmware in the market. Thank Denon ...