@calieng wrote: "
Actually it is well accepted that I2S sounds better in any system. It is the most direct and least processed connection. There may be some exceptions but they would be rare. I2S is how your streamers and DACs communicate internally on their main board. So anytime you interconnect with a different format you are losing some info thru translation."
Don't know where you're getting your false information from. Just a quick visit to the PS Audio Forums and you will find many that have moved away from the DS DAC w/ I²S interface to a USB streamer/DAC combo and are quite content. My setup is significantly better than it was with PS Audio and an I²S streamer. And I'm using inferior USB now. It has more to do with implementation of the interface than it does with the type of interface itself. Just ask dCS, Ayre, MSB, Chord, Aurender and on and on. They all use USB as their main interface and they all know damn well what they are doing.
Why Lumin does not provide I2S I do not know but they will be left behind soon as that is where things are headed.
Same as the above high-end manufacturers. They know a thing or two and certainly aren't anywhere close to being obsolete.