Strange message Air/MacOS

[Confused]

Has anyone compared D Premier to 140Pro sound wise?
I realise a 140pro will give me usb which can be used with Purevinyl, a lot easier than buying an ADC plus i'll get set up support. But sound quality trumps features for me.

First to say welcome to the forum, and it is great to see another person running a Devialet and KEF Blade.

I have heard both the D-Premier and the 140Pro, but at different times and with different speakers so cannot really comment on a direct comparison.  Plus, I have never seen anyone who has performed a comparison between the two and reported their findings.  Maybe nobody has ever tried it?

What I can say is that I have heard the KEF Blade with the D-Premier, and for a long time I ran my Blades with the D240. (which later became a D250 after firmware update)  The D240/D250 is very similar to the D-Premier in terms of basic performance and sound quality, and is in my opinion a very good combination with the KEF Blade.  I was very happy when I was running this combination myself.  Before buying the D240, I had a demonstration of the D170 with the KEF Blade.  My thinking at the time was that the D170 was a lot cheaper and that it should be more than good enough to run the reasonably efficient Blades.  As things turned out, the D170 was not good with the Blades, the D240 seamed to run them fine, with powerful well controlled bass, but the D170 was terrible, the bass definition fell apart, it was not good to listen too.  I had to conclude that the D170 was just not powerful enough for the Blades, maybe a quirk of the four bass drivers, something in the impedance curve, I don't know, but the sound was poor.  I have never tried the Blades with a 140Pro, but based on what I do know from the D170 experience I would have serious concerns about if they would work or not.  You would need to actually try it before buying one.  To buy one on the hope it would work OK would just be too risky in my view.  I suspect that with relatively small easy to drive speakers that the 140Pro may well out perform the D-Premier in terms of clarity and absolute detail retrieval, but for something to drive the Blades, I would doubt it would be a good match.