Hey Guys and Ladies, I've got a simple question from a simple mind. I just ordered the sMS200 and should have it any day now. Curious about the PS. Currently I have a microRendu whose power source is the sotm mBPS-d2s. No complaints whatsoever. I was considering getting another mRendu for another room in my home. I am running ROON on a QNAP and its great. After seeing Hans B. comments on YOUTUBE and reading the comments on this forum along with other reviews, I'm going to try the sMS200. Actually I met May at THE SHOW in Newport this past year and was told about the sMS200. Anyway I was considering getting the Sbooster 9v-10v for a PS. That is what I think Hans B used and really liked it. My question is this "those of you using or are considering using the Sbooster are using the 12v-13v Sbooster. My question is why? I was under the impression the lower voltage was better. Please help me understand. The specs on the sms200 say 6.5v-14v I believe. Thats why I selected the 9v-10v. Also I recently got the W4S PS-1 for another item in another room nonrelated to the mrendu or the sMS200. What are your thoughts concerning that? Thanks for your imput.