PS Audio Smoke and Mirrors?

In theory by doubling your output frequency of your AC from 60hz to 120hz will makes the power supplies in your equipment act as if they are twice as large. This is because there is less "downtime" between the full positive and negative sides of the sinewave as it travels back and forth. Imagine looking at a sine-wave on an oscilloscope as it goes between full pos. and neg. The less time spent at neutral or close to it is longer time that the power supply is being charged. If you were to provide your equipment with 180hz, your power supplies would behave as if they were 3 times larger. I hope this explanation helps.

I don't know the science behind it but I do know what my ears tell me and I can hear a significant improvement in overall clarity and smoothness with the frequency set to 85-90. If I go above that the sound starts to thin out. I personally felt I got a bigger improvement from changing the frequency than I got from the box itself set at 60 (compared to no power conditioner at all)

Stereophile also said it made a difference to up the hertz to like 90. So it must be doing something right.