Ok, that I understand. Right let me try to explain, When I connect the mic to the mixer, my gain is on infinity, the channel slider is down as are the aux controls to the monitors etc. What I hear through the pfl is a sort of ring on high frequencies, and I picked it up on a recording I did.
Now because the hall is not that large my main amps are set at about just over half the max volume. Now my equ for that channel is more or less like this. High -4db, High mid frequency sweep -1k cut, High mid frequency range -4 db, Low mid frequency sweep, 2khz, Lmf range, -10 and the Low frequency is at +4db . With the channel sliders down and the gain at infinity I am getting about 3-5 db on the vu meter. Now I bring up the main volume to -5 on the slider and as I move the channel slider up I can only go to between -3 and -5 db before I start getting feedback on the main speakers. The thing is re the settings on the channel eq were done like that to reduce the feedback and still give me as much natural sound as possible. I can move the gain up to about 1/4 of the way up but that makes my work even more difficult. So I want be able to still work in that range but have more reasonable settings on the mixer eq. Like I commented earlier I need to redo the settings on the main equalizer as since we changed our main voice mics from Shure to AKG and also the mixer from an Allen and heath to a SoundCraft everything changes.