with my nearfield JBL's, which are matched to the size of my small tracking room;
with my ARC2 setup, which easily lets me fold down to MONO;
with wavelab, which is setup with Waves Plugs, including a nice phase meter;
and dual volume presets on my sound card (low volume mixdown, Full volume mixdown),
i can check against fletcher munson, phase, balance, all the things that you have to do to get that mix to happen properly loud and soft....
but even without all that,
i can say that LISTENING, to as much pro material as you can,
out of your monitors, in your room,
will help train your ears to how things should translate....
and listening low volume, and at mixing volume, and comparing those two situations against your own mixes,
is time well spent