I'm using monitor 70s as fronts with an F12 subwoofer in a 3.1 configuration. After running automatic configuration on my receiver, it set the 70s to "large". However, some people suggest that the sub should handle all the bass and I should manually set the fronts to "small". This seems to be a bit of a waste of the 70s! From my limited listening tests so far, I don't hear a big difference between having the 70s as large or small. What do the polk experts here suggest? The system is used for a mix of both stereo audio and HT.