EMM "Versions"

Really no different version except to say that with each production there is often what is called "rolling line changes"

Having said this however, the newest version of the CDSD has a plastic Philips transport as compared to the prior metal transport. The latter is no longer available. Also the newer version has a USB port in the back for making firmware upgrades.

The newer version of the DAC6e and the DCC2 also has Meitner's discrete DAC's rather than previously used DAC's as mandated by Sony. The discrete DAC's allow for upsampling (with the newest CDSD) to 2X DSD. In spite of this regular DSD sounds better.

Long and the short of it, regardless which model you have IMO it is the best digital source in the market today.

One final caveat which I forgot

The newer versions have a satin finish to the front panels whereas the earlier versions were somewhat polished.

Also the newer CDSD is lacking the symbols for DSD as well as SACD, none of which obviously have anything to do with the sonic reproduction.

The newest production runs have the discrete DAC's as best I understand it

yes of course you can switch from 1X DSD to 2X DSD and vv