Hello! Big problem here. Set tones, tested through IEM's and studio monitors via XLR's prior to gig. Get to gig, plug in XLR cables to Left and Right out. Hear momentary signal, fizzles out and eventually heard zero volume. Noticed Stomp A, B, C, D and X are Out and not functioning, although all programmed stomps can be heard. Troubleshooted properly, ran direct out through unbalanced outputs. Played gig without hiccup. Get back home, try practicing through headphones... that's bust as well. Literally the only thing that changed about my rig was the venue. Could a phantom power signal from the board have done all this?
TIA