I've been interested in a product like the microrendu with linear power supply. But, I don't want to pay $400+ for the power supply. I wonder if it would be feasible for a good engineer to offer one for $99... probably not. Heeheehee.
I've just ordered Uptone's LPS-1 for a uRendu that I already have...it's been a tough call...been on the fence for a while. The subjective evidence was (to me) somewhat overwhelming on various forums...to varying degrees. I had to find out for myself...finally. We'll see if it makes sense in my setup.
EDIT: I'm purely guessing...but I wonder if the difference may be more significant on more modest DAC's like mine rather than more upmarket DAC's. (altho, I am considering an upgrade to a Schiit at some point soon). BTW the LYR 2 is superb.