I have the M3Ti's as L&R mains. I am working on selecting a sub to match them. I would like some input from the experts here on how / where to cross the M3Ti's over to the sub.

Assuming that I dial the sub's low-pass filter all the way to the right (i.e. to its highest cut-off, moving its effect out of the equation to the extent possible), where do you suggest setting the receiver's LFE cross-over?

Assume that the receiver can cross-over at any selected frequency, to avoid sub-optimizing.