Question about Teufel Ultima 20 Mk3 Surround

I use the Denon AVR-X1600H with these speakers. I am absolutely satisfied with it

I personally bought the Marantz NR1711 with additional atmos speakers! The Marantz NR1510 would be 5.1. As a second choice I would have taken YAMAHA, because Marantz and YAMAHA cope very well with the digital audio signals and there are almost never problems with sound dropouts, no matter which devices are connected.

I use the Denon AVR-X1600H. The only thing that bothers me about the Denon is that it loses the connection to the router every now and then. Therefore it is advisable to save the setup on a USB stick after calibrating etc..
After the third reload, I pulled out a cable so that I no longer had to access the router via WLAN in the hope that the connection would now remain.

*I forgot to add: Would be great if this is Bluetooth or Spotify compatible. I would like to control it wirelessly with my mobile phone if possible, or otherwise with my PC :)