Would the performance of the M60 better (especially 2.1 music) if I ran my Marantz SR6003 pre-out to my SVS PC12+, then from there drive my M60?

I heard that this would made the sub better integrated with the L/R using x-over from the sub.

Would this mean that my AVR would drive other speakers with more juice by taking away the L/R from them?

How should I configure the AVR x-over if I connect it this way?