Totally correct! It is the Current that makes the differance not the voltage. So if its buzzing then there is something else wrong. All that you need to look at the voltage level is a Digital Volt Meter. You can see if its actually a voltage flux or not. My guess is a bad dimmer somewhere or a balast from another product on the same line.
Problem with AC and how to solve it
I have a problem with the voltage at my country home. It's either too high or too low, I'm not sure. The result is that my amps are buzzing, sometimes so loud that I can hear the buzz from my listening chair, witch is some 12 feet away. This buzz is annoying but I could live with it if it didn't affect the sound. Saddly enough, it does. Has anyone been exposed to that problem and if so, have you found any solution.
My amps are Classé's CAM-200 monoblocks. They are dead quiet when the voltage is ok.
My amps are Classé's CAM-200 monoblocks. They are dead quiet when the voltage is ok.