I’m interested in this as I have a D2 with SBooster and previously had a Node 2 (as well as some other DACs). It’s obviously a helpful test, as it appears to demonstrate in that environment and with that equipment, that there is no audible advantage to the D2.
However, I’m curious as to whether there were any other DACs tested in the same session? Without some sort of control condition, we don’t know whether it’s the environment/equipment masking any potentially audible differences, or whether there’s indeed none there.
I’m keeping an open mind here, as, for example, I have been very impressed by my recent purchase of an RME ADI-2 DAC FS and have been meaning to try a comparison with my D2 at some point. That said, you’d have to pay me to purchase another piece of Bluesound equipment…but that’s a bit of a tangent to the discussion.