Is it possible to make the connection between the Prime 4 and the PC wirelessly and how do you do that? Do I have to buy a dongle? If it is not possible with WIFI, can it be wired with the RJ45 connection? Or are there other options? I ask this because I now use Engine Prime with the USB cable and the PC is not installed near the Denon Prime 4
No not supported, yet.
A Prime4 and the BigPrimes do see each other in the same network, but not a computer.