I need impedance help. Rogue RH-5 to Solid State Amp.

I do not understand impedance, but I usually use the 1:10 rule when making a pairing. That has helped me get by in my ignorance.

I am in a situation where it’s a little more complicated. I can’t find much information on the output impedance of the RH-5. It seems like everything I read is about the headphone amplifier output rather than the pre-outs. It also complicates matters with the 3 Gain settings. Maybe that makes no difference?

I am currently using a Cambridge with an input impedance of 33k ohms or a Denafrips at 22k ohms, but I’d love to get an idea of what I’m actually looking for. Although my main amp is a good match with it being a tube amp made by Rogue, I want to find a good solid state amp to have nearby.

I read somewhere that the balanced outputs have a different impedance than the unbalanced.

So, what should I be looking for impedance wise. And does the gain settings change anything? Should I avoid the balanced outputs with a wrong amp pairing?

Thanks to anyone willing to help.

Nick