Expert Pro 440 vs. 1000

[Confused]

What would be interesting to know is whether the power supplies are the same. That would mean the 440 has a lot more juice to draw on compared to its amplification than the 1000 does. The 1000 still has the advantage of delivering more of that power though.

Agree.  Would be of great interest to determine the hardware differences between these two series.  Wonder if @Jean-Marie would have any comments on this subject.  (assuming he has the ear of the company)

I have occasionally wondered during a listening session, how the 1000 would compare to my 440Pros although I have no complaints with the 440, just the usual audiophile nut bar tendency to look for possible upgrades to the system at hand.

Some answers to the above can be found here ....

https://devialetchat.com/Thread-D220-Pro...ht=rev5.05

Looking at the pictures, both the 220Pro and 250Pro have almost identical looking power supplies, the PSU's share the same rev6.02 designation, and the components look almost identical.  (only some slight colour differences)

One difference that can be seen is with the ADH boards.  The 22Pro is designated rev6.022/4L, whereas the 250Pro is rev6.01/6L

See pictures below, the first picture is a 220Pro, the second a 250Pro, the visual differences are obvious.

   

   

From past conversations re the old 200 versus the 250, my understanding is that the firmware used in the PSU varies between models.  So in other words the PSU in the 200 is electronically restricted slightly versus the 250, basically due to the differences in cooling capability, so the PSU is held back slightly in the 200 to stop it frying itself.  I guess it is likely that this remains the case with the 220Pro versus the 1000Pro, but I do not know this for sure.

Whilst it is clear that there are visual differences between the 220Pro/250Pro ADH boards, I do not know what the actual differences are in practical or performance terms.  Maybe related to cooling?