samie That's why I pay attention on the Linn CD12 limited MK3 (with 6 digits serial number). If this limited CD12 mk3 is too difficult to find, I'll give a try on others instead.
I know this is old, but I have one of these CD12 MkIII's that a friend gave to me very cheap, and he hardly used it. SN700139 it also has the 24bit PCM1704K dacs.
Unfortunately Linn deleted the U8 user setting via the remote of being able to choose between the 8 different dither settings that the PMD100 hdcd chip has. Something I believe is more to do because it uses the PCM1704k 24bit dacs instead of the earlier PCM1702 20bit dacs.
Cheers George