hey robert,
i recall you talking about using the high pass filter on the 7xx series in the past. what setting do you use? you mentioned 40Hz, but what slope do you use? (12,18, or 24 dB/oct)
the reason i ask is b/c i have an upcoming show with a band/venue combo i always roll-off in post. i'm thinking about giving the 722's filter a shot. in the past i've set my filter in post to 70Hz @ -3dB/oct. I'm trying to figure out which setting would be best in this situation.