Alternate AC power frequency.. Higher than 60Hz

Watching a Paul McGowan utube video about "What’s the best voltage and frequency’I see he would go up to 400Hz for AC voltage frequency.
I use an older PS Audio P600 with an optional board which lets me boost AC from 60Hz up to 120Hz.
I use it at 111Hz to power my digital gear.
So far, over seven years, a few items died, Particularly Sony changer. ALso a Behringer DEQ2496 sounded better on 60Hz.  But other changers and DACs thrive and sound better with the higher AC frequency.
No no other (A few PS Audio P300 P600 P1200 with the optional board can do it) regenerators ’do’ higher AC frequency. But someone wrote the new PS Audio P20 will also up the frequency if so set.
Now not one word of this on PS Audio P20 owner’s manual. nor anywhere online.
Maybe I have to CALL Paul?
SO.. Anyone else hear of the PS Audio P20 being able to up the Hz from 60?
And yes I will discuss the benefits of this. Up to a point. If you know nothing and want me to educate you totally. Ahhh no, that is not gonna happen.
If you want tp view the utube video: https://www.youtube.com/watch?v=Np--y3Kfy28