The UpTone Audio "UltraCap™ LPS-1" (formerly know as "mystery PSU") is revealed

[AllenB]

But if one owns a Uptone JS-2 already (as I do), or indeed any other very good LPS, why would I want the Ultracap?

Good question!  Well, my guess is you probably won't, not unless perhaps you needed something smaller/lighter.
I suppose there's a chance that it will be better than the JS-2?  I sort of got the impression from their own posts that they were making out performance was about the same though.

I wonder if they'll publish any sort of specs/graphs....

Thanks Steve, yes I am getting the same impression, for example JS answered my same query with a focus on isolation of supplies from the DAC on the other side, rather than any benefit to SQ. I know the JS-2 is already a very good LPS (in fact you get two rails which can be very useful), I am suspecting that I should not need the Ultracap as well.