Thank you for all the info!
When I do that unity test thing, or what I think I'm supposed to do anyway, the level doesn't even reach midway thru it's travel. It goes to about 20db. The unit is a Yamaha aw4416, the meter says db on it, I may have the meaning of db wrong, I thought it meant decibel.
What does dbFS mean?
My mixes DO sound all mudded up.
I have noticed a softer feel to tracks that I thought were recorded too low, but never thought of input levels because of my huge case of paradigm paralysis.
I really need to get a handle on this, thanks again for all the input.