I use an APC regenerator - it works fine - it makes a click when the AC goes on as it adjusts the voltage to keep it within target range.
Voltage fluctuations
I recently moved. Along with the new house, I also got fluctuating voltage to my system. This is a problem I have read about in the past but have never experienced. The lowest it has ever dropped is 110v. My biggest power consumers are my power amp, ht receiver, two sub-woofers, and an LCD flat-panel. Can 110v create any problems for my equipment?