Hello Grok,
Sorry if I've confused this issue. The x-over applied to the main channels when fronts are set to "large" and sub is set to L/R + SUB is dependant upon whichever crossover is selected for the main speakers in the speaker x-over menu. Please keep in mind that this crossover only determines which bass will also be sent to the sub from the main speakers. It has no effect on the bass being sent to the main speakers or the LFE signal. As a
"large" speaker your front speakers will continue to receive a full range signal.
Scott