This sort of problem is so very real, that i convinced a few audio show runners that before their given show plays out in the given hotel complex...
..that they needed to have an electrician come around and give a little twist and check on every single associated in room and out of room AC power line tie down (screw down) points in all the associated AC power boxes. and to not neglect the ground lines, either.
And the outcome is an obvious better sound quality for everyone in the display rooms.
As most hotels will never have their AC panels checked or serviced, unless there is a severe problem. As AC operation is critical for them, and AC power quality ---means nothing. But the audio folks want quality as well, and that requires making sure the lines have no issues.
..that they needed to have an electrician come around and give a little twist and check on every single associated in room and out of room AC power line tie down (screw down) points in all the associated AC power boxes. and to not neglect the ground lines, either.
And the outcome is an obvious better sound quality for everyone in the display rooms.
As most hotels will never have their AC panels checked or serviced, unless there is a severe problem. As AC operation is critical for them, and AC power quality ---means nothing. But the audio folks want quality as well, and that requires making sure the lines have no issues.