I'm not sure I know how to "qualify" that statement. I will say that the voltage regulation definitely does help to change the electrical nature of the tube power supplies and give an amazing tool set to fine tune the sound. And I use my amps and pre-amps and ZROCK2s with the Anniversary Mods with a power regenerator and the regenerator certainly, in my opinion, improves the overall sound. Many might find that improvement. .. superfluous perhaps, or questionably audible, I've seen that in reviews and impressions, but for me comparing to just plugged into a wall, the improvements are real and desirable. Same with power cord comparisons. . . clearly audible improvements with some over basic IEC cables.

I haven't heard the UFO25, but my pair of SE84UFO3 Monoblocks with the Anniversary Mods sure sound great, and respond with clarity and dynamic contrast to power treatment such as a regenerator and power cabling.

I do not know the physics behind cleaning AC and a lot of people say when AC is converted to DC there should not be an issue with “dirty” power.  However, I use filters by Black Noise and Stein Music, as well as power cables by DHA Labs, and the outcome is like night and day!  The backgrounds are much darker, the details are finer and the soundstage is much deeper with these filters.  And this is based on some blindfold listening tests, not on some audio hoax…