You broke my brain.Combo answer to you and Fredygump.....
I use two subs to fill out my main speakers. I've measured them and they roll off at 50hz. I use two subs, one for each speaker to fill the 20-50hz gap. Then a third sub for LFE for 5.1/Atmos content. I set the two subs for my mains using the built in DSP for the SVS subs. Pretty much the same as you Fredy, though a slightly different method. I then let the rest of the DSP be handled by the RMCL-1.
How do you configure that? RMC1-L outputs to your mains, I am not understanding how you connect subs and mains together. Assuming LFE is from RCM1-L direct to subwoofer?! (quatement - question and statement at same time).