Hey Dustin,
OK, so good to know about the various types of pups you're using, thanks!
Your IEMs will likely solve your problem as my suspicion is you're getting low-end feedback via your floor wedges ...super common with acoustics! You've got to do what you can do in the meantime to reduce your stage volume. I get what you're saying, I used to stand to the right of the drummer, so snare, hihat, and crash was all in my face so yeah, I need the vol up just to hear myself. But try EQing bottom end out of your wedge if you can, but if yours is not on an individual channel, then cut some bottom and try bumping up some mid-highs a bit to get tonal definition with less volume so you can hear what you're doing, and trust that the FOH sound is good despite what you're hearing in the wedge.
Yes on the notch filter. Play that open chord and find that freq with your Venue's notch filter control. The problem is that the frequency you find (which you will then attenuate) will be different for each of your guitars. So while the notch filter will most certainly help, ultimately it is the combination of reducing volume and attenuating the offending freq that will end your feedback woes.
Edward
