Commercial power is noisy and sloppy, especially in my neck of the woods. I use a double conversion UPS (always on) to clean it up. I can feed them with a gen

Commercial power is noisy and sloppy, especially in my neck of the woods. I use a double conversion UPS (always on) to clean it up. I can feed them with a generator and the output is still a nice steady clean sine wave. Beyond that, I use line conditioners and rf chokes to clean up the noise a little prior to reaching the ups. Double conversion ups are not cheap. They start around 15x what you pay for the AVR UPS that you can find in electronic stores. My power is so sloppy that AVR UPS catch on fire after about 10 months.