He was mixing the sound so loud that I just had to find out what the level was. As discretely as I possibly could, I did a quick survey of the room. I measured 115 dB SPL during worship at the middle of the room. Jeanna and I looked at each other, and made a quick dart for shelter at the back of the auditorium. He knew it had to be me.
People are different, and every church is different.
I was on staff as the Audio Director for a large church for eight years. I always had my trusty little Radio Shack SPL meter sitting right in front of me. If there were complaints about the sound, I heard about it. If it was one or two complaints, we took note of it. If you can do that successfully, I would encourage you to do so.