I have found, over the years, that we always start at a decent enough volume, but as the night goes on, I feel as if I'm listening to a wall of noise. The desire to turn up to be heard is almost unbearable. I have asked the others have they turned up and they are adamant that they haven't. I've since found out that our ears, when faced with prolonged loud noise, will try to protect themselves by blocking out certain frequencies. This makes for a weird sensation of mud in your hearing, which is hard to play through. I have concluded that A, we are too loud to start with and 2 , monitors are a must!