No, I use full range monitors.
There are a few bass managment systems with SWs, that work ok, but I rely on full range systems for various reasons.
When working on 5.1 surround stuff there is a sub on it, all the time. For surround music I usually don't use the .1 channel.

No sub here either except for 5.1 work. I tried adding stereo subs to my full range monitors and I wasn't digging it. But I have heard them work very well on other systems.

I have a Miller&Kriesel 55160 Subwoofer that I'll engage if needed, pretty much just for the checking all the under 40hz stuff

Full range. Properly calibrating a two-way system is hard enough... :cool: