Interface and monitors interaction

Hello there, how are you? My name is Marcos and I am a mixing and mastering engineer from Brasil.

I am waiting for a pair of studio monitors that I bought and this pair has RCA inputs, so unbalanced.

I own an UR22, not UR22mkII, but the older UR22. I want to know: The impedance for unbalance signal (output) is 10kOhm? It’s ok to plug the new pair using a TS>RCA adapter to the RCA cable so plugged into the monitors? I am not sure about the impedance compatibility about UR22 and the new pair, should I be affraid about it or normally it’s ok?