Everyone suffers from time of day performance because our power lines change from hour to hour. Couple that with the realization that power plays a critical role in sound quality and it won’t take you long to understand why you need a regenerator in the system. They are fundamental to attaining a proper foundation for high performance audio.
Steven’s correct that some gear are more sensitive than others but in my experience all gear needs clean, regulated AC. I have yet to find a piece of kit that does not immediately get better when plugged into a Power Plant.
Our devices provide a front panel analyzer for power that include a THD analyzer, voltage measurement system, an oscilloscope. You can see what your incoming power looks like and what the Power Plant does to correct it.
If you’re interested we have a pretty easy way to take one home for a month and see. Just give us a shout.