Originally Posted by Spectrum View Post

Or why not run it....

Mixer --> Sub --> Monitors (via the sub's hopefully high passed outputs)

I get that one might want to tweaking mains vs sub via the control room vs main output level controls, but in the real world it should be set and forget.

And running a single stereo signal from the mixer to the sub+mains combo means the ratio of sub output to the main levels is maintained at any mixer volume output level

yep thats how i run my set up. I am using a hifi/home theatre sub, then hi passed to my passive Vaf bookshelf's. I can also choose to run the bookshelfs full range out of the sub, but the sound is much clearer when hi passed.