I am not sure about quality control issues, but I did have an issue with my Primaluna HP integrated leaking noise between inputs, which made me wonder if the input relay was in fact doing anything. Kevin assured me this was not an issue but it bothered me enough to sell it. The prologue 3 preamp / prologue 5 amp had no such issue and I didn’t think upgrading to the HP integrated would leave me feeling regretful. But sometimes we just get the short straw. I since upgraded to a Backert Rhumba 1.2 preamp and Paradox Pulse Monoblocks and I will say the dynamics and noise floor alone, are in another league.
We should all remember there is no brand that lacks competition.
We should all remember there is no brand that lacks competition.