Mojo: I've never been able to blend the sub with the M60's. The only way I can do it, is to cut the phase close to zero, and set the sub's volume to almost zero. Perfect - the sub is now doing nothing, and I can listen to those sweet M60's.
You should be able to integrate the crossover of a subwoofer with the M60s by dialing it around to the 50Hz point or so. Possibly even a bit less.
Then play around with the gain. I like to set my sub to a less than SPL equalized value compared to the M60 mains since i find most movies tend to run a bit 'hot'. For music i prefer the M60 bass anyway so a bit less from the sub works out perfectly.
One still needs a sub to hit those really low notes.
