If you look at the ports behind the network player Roon Nucleus Plus, they are HDMI output ports.
Since it is not an ARC output port, it cannot be connected to the RS150 ARC input port.
However, if it is connected via USB, there seems to be no problem in using it.
Can I use ARC input on my RS-150B to connect Roon Nucleus Plus using the HDMI A or B output?