I just got a new ifi itube with the ipower psu. Sounds amazing. I'm listening in pre amp mode. Its in my opinion much better then my pass b1. For everyone looking for a cheap but very good single source pre amp, there's not many choices around and the ifi itube sounds great. Ill be getting a lightspeed attenuator soon to compare as Im looking for the best pre amp under 500$. Its crazy how theres really not a lot of cheap but transparent pre amps.