Yes, the PA was buzzing as I walked in the venue before I had even set up. I primarily heard it out of the monitors not the FOH but I can't be sure. The sound guy was a sub for the guy we hired, and he confided in us after he couldn't fix it that it was his first live gig and was actually a recording engineer having just graduated from school. Including lights? the stage had par cans, LED bars and a set of fluorescent black lights running across the back of the stage (they were off) Before I connected to the PA at all I just went gtr > cable > kemper > XLR out to my own active monitor and had much higher than normal buzzing on medium to high gain patches that I couldn't dial out with the noise gate. Next I ran the XLR out to the board and used an unbalanced TS cable from the monitor out of the kemper to my active monitor. Same noise and the ground lift switch did nothing. It was at that point that I powered down the Kemper and plugged my power strip into the HUM-X into the wall. Also did nothing. At this point they were getting ready to open the house doors so I finally disconnected my monitor, ran the xlr out to the board and used the PA's mixer for monitoring. Did not help. I got through the gig by tap dancing patches all night using my clean patch more than usual and riding the volume pedal and gtr volume. By the time I did my own troubleshooting I could tell the sound guy was struggling himself even just getting descent monitor mixes for our 4 singers and the house refused to turn down the DJ music because they were "open" despite not one soul being in the club. So I gave up on trouble shooting and knew it was going to be an unpleasant gig. Anyway the place is called the Living Room on Long Island. I wonder if anyone else had played there with similar issues. Jmoose unless i missed it i didn't see any mention of airborne noise not related to dirty power. Thoughts on that?