Connect UR24C to home amplifier (RCA Connectors)

Hello everyone,
I’m new in the forum. I have searched for an entry with the term “domestic amplifier” and I have not found anything. So I’m going to start a new topic with this matter.
Connect UR24C to home amplifier (RCA Connectors).
The question is seemingly simple, but it requires some technical expertise that I don’t have. I don’t have a mixer, nor is it in my plan to buy one at the moment.
My current setup consists of a Windows 11 PC equipped with a 13th generation i7 processor, 16GB of RAM and a Soundblaster AE9 general purpose sound card.
To listen to the computer, I have the audio output of the SB-AE9 connected to a line input (CD) of the amplifier via Toslink, so that all the sound that is generated in the computer is heard there.
After several tests, I have come to the conclusion that it is not possible to use both cards (SB-AE9 and UR24C) to listen to them through the computer, or I have not been able to configure the system correctly (suggestions are welcome). In any case, since the UR24C is the one I want to use specifically for recording my instruments with CUBASE, I don’t mind using a stereo RCA Line Output as a standard RCA amp input (CD input), like this It would have two channels, one for using the computer for everyday tasks or listening to music recorded on the hard drive, and another channel for monitoring tasks.
The question I have has to do with the values of the line output signal (line output) that is specified in the UR24C documentation for the inputs of a mixing console. Are these values compatible with the values of a home amplifier? (CD input)?
Thank you very much in advance for your patience and wisdom, I think this could be useful for other people in a similar situation as well.
All the best,

Only one ASIO device can be used at a time.

You should plug the output of the soundblaster card into the UR device, and the line output of the UR to the rca inputs of the amplifier. Don’t plug the soundblaster into your amplifier.

The downside is that the UR24C has only 2 inputs, so you still have to switch out the the sound card cables to plug in a microphone

Yes, that is the definition of Line Level.