There is no official documentation confirming that the coaxial digital output of the Noxon A120+ supports 24-bit audio. In practice, it must be assumed that it is most likely limited to 16-bit because this is the standard for radios/streaming adapters and no requirement for 24-bit output is documented.

Unfortunately, I cannot answer this question, but it should be available in the technical documentation.

I can't answer that exactly, but I have connected the coax output to the tuner of a Revox Evolution and it works perfectly.

Unfortunately I cannot answer this as I use Ethernet directly from the gateway.

I don't know that