I have no clue what knockoff amps OP is referring to, since I didn’t even know that Krell made HPA’s. The truth of the matter though, since we’re discussing headphone amps, is that the best, most accurate ones on the market ARE made in China. Most of the best ones use THX Achromatic chipsets as their base, for example the SMSL SH-9 that I use, but there are plenty of great modes that don’t (Topping A90)
