There is no such thing as a MK1, 2, 3 and 4. There is a DAC6 and a DAC6e. The only differences are we added RCA connections and removed the fan which was for rack mounting.
The DAC6e that has been available to the public has always been the fourth generation of Ed Meitner's design. Earlier generations were only available to recording studios and have all been upgraded to the newest generation..
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