1. Bluetooth function for immature me, can the AVR-X2100W unfortunately be looking only from other devices such as smart phone or tablet. The receiver will scan but unfortunately not even then, or coupled with other devices.
This is a disadvantage because I look at the Philips SHB7000WT / 10 Bluetooth Stereo Headset (1.2 m cable length) white / blue bought here on Amazon for me. Unfortunately (but of course for me) can these headphones even looking and can not find a device and this coupling. Thus, no connection between the two devices is possible. The receiver could even looking through the TV or on the app on your smartphone or tablet and other devices show and offer for coupling, which makes the receiver but unfortunately not, but gives himself free only to search!
2. Standby function for me Incorrect: The receiver is checking the HDMI inputs and an audio input whether a tone or audio signal. If a long time (at the preferences of 15 - 60 min. Adjustable), no audio signal is fed via the inputs, the receiver is in the standby mode offset. So far so good ... unfortunately Denon has not but the internal audio signals such as Internet radio and Web server inputs considered that not come from external devices into the device.
If you now so listen Internet radio and the receiver no audio signal over HDMI or Audio receives inputs, the receiver every 15 minutes turns. from (15 min. Standby automatic default setting, the receiver)
Here I had the standby function provide completely on from, so I can enjoy Internet radio or music from the web server.
3. From time to time sporadic crashes which have to be eliminated only by complete current drain. Suddenly no sound and no response by the remote control or the power button on the device. This could be remedied Weitens, by manually setting the video and audio parameters. It seems that the receiver did not come with the "automatic" setting clear who was placed in a variety of video and audio parameters, here I have fixed parameters set and no longer let the receiver decide. But it also happened, since I have seen a 3D movie and the Blu-ray player from 3D to 2D back wanted, even here the receiver is ever crashed completely. Now I have the up-scaling options set to off, because my equipment supports all full HD full screen size and quality I do not need the image upscaling improvements of the receiver. Since then, apparently calm and a crash so far gone ...
I have shared and asked if they could make these problems fixed even at Denon, and if so whether they must be remedied by firmware after registering by mail function on the Denon Homepage All these problems.
Sorry, no response so far from the support! Too bad ...
Until now, only a firmware update, right after the first installation so after purchase and connect the receiver. What has improved this update, I can not say, therefore.
Once I have new information to it and I think I make new release here ...
Although PS .: This rating tells only negative, which does not mean that I will make the device badly. Otherwise indicated all top as in the technical data and test results and exquisite there. If you have questions about the device, I like to go also to other options of the device, however, wanted to first tell what has struck me personally negatively on the device!