Just one more thing. Any noise in hi-fi is, by definition, audible. At least if it's going to matter. Asking if inaudible noise matters in hi-fi is a bit like asking about witnessless tree fellings.
If the PEQ from RC creates noise, then the noise should be there, whether music is being played or not, as long as the PEQ is running.
So, run RC, allow the PEQ filters recommended, and turn it on. Without music. Then turn up your amp to a level just above that which you listen to at maximum, and stick your ear to your speakers' drivers.
If you can hear noise, it's there. If you can't, it isn't, or is at least inaudible.