HI,
A little into:
I have been asked to run sound at my new church. I have some knowledge, actually just enough to be dangerous!

I have read "study hall" posts on the old forum, this forum, links in the forum discussions, and other internet articles. I now know how much I do not know.
I have not started yet. Last week someone else was "mixing" and there was a boominess or "rain Barrel" empty sound to the worship leaders mic. She leads from the piano, infront of the main speakers, wearing a cheap (under 400 for 4 sets I think) headset mic.
I have sweepable mids on the channle EQ on the board, I think from my reading that I can cut a frequency in the lower range to help remove this? I use the sweep to find the frequency and then the other one to select the amount of the cut?
Any idea which frequency to look at?
Thanks for any help, sure I will be back with more questions.