I have no idea. There is no switch at the back and it uses a linear PSU rather than a switched mode like the EMM.
Having been A:B-ing on discs, I still think the XDS1 sounds a tad more resolving. The Playback sounds a bit richer but it's at the expense of the last smidgeon of detail. But for the most part, it's very enjoyable because there's more emphasis on the vocals and strings/instruments in that range. The XDS1 allows more of the background instruments to be discernible and it is impressive in that way. Both are smooth and grain free, very analog sounding.
BTW, I thought the USB-X with AudirvanaPlus reduced that midrange emphasis a bit which made it sound more like the XDS1. Odd, huh?
Having been A:B-ing on discs, I still think the XDS1 sounds a tad more resolving. The Playback sounds a bit richer but it's at the expense of the last smidgeon of detail. But for the most part, it's very enjoyable because there's more emphasis on the vocals and strings/instruments in that range. The XDS1 allows more of the background instruments to be discernible and it is impressive in that way. Both are smooth and grain free, very analog sounding.
BTW, I thought the USB-X with AudirvanaPlus reduced that midrange emphasis a bit which made it sound more like the XDS1. Odd, huh?