Now I simply decided to separate myself from the device, and to acquire the Yamaha RX-V375. The delivery went from time factor not quite optimal, but Amazon does not take responsibility. Connecting the device was easy to do. Also setting including calibration of the speakers was very intuitive and easy to manage, and also the further operation worked right away. A benefit compared to its predecessor.
The following soundcheck with different media and genres then finally hit me literally from the stool. An absolutely clear, vivid, detailed and voluminous sound, which I would not have believed in this form and in this price range. A noise is not present at all in contrast to the Pioneer.
Conclusion: Those looking for an easy to use AV receiver of good quality and without any frills like Internet Radio, in conjunction with a very good sound, which can access all safely here. Clear five star and just buy it from me.