09-Feb-2016, 17:30
(09-Feb-2016, 14:47)Confused Wrote:(08-Feb-2016, 12:21)GuillaumeB Wrote:(08-Feb-2016, 12:06)yabaVR Wrote: I suspect they do it with some additional filter in the software that weakens the D200/D120 and/or with the inner surface of the D250 being painted black. I suspect this black paint being a shielding lacquer that protects the circuitboard to some amount from the bad chrome-nickel-el.mag.-effects of the whole surface.
Isn't it the case that the 250 chassis is different from the 200 and provides better thermal management by virtue of its physical properties, being machined from solid aluminium and providing better heat sinking?
Guillaume
I recall discussing this with Devialets chief engineer Mathieu Pernod at a dealer event. This was a little after the launch of the then D170. Matthieu advised that the D170 had essentially the same electronics as the D240, but was restricted due to thermal constrains. The D240, with the "original" design case based on the D-Premier offers better transient thermal cooling.
So the current D200 has software restrictions on the power supply to keep the thermal issues in check, whereas the D250 is limited by the power supply itself.
Ah, I see. First hand information. Thank you for that.
But I question Mr. Pernod answer as one can see no physical thermal constrains as I have opened both, the D200 and D250, and you can't see, where the D250 would have better thermal skills (see pics above).
The D250 has even lesser thermal contactarea due to this window at the top, where the D200 has a BIG alike heatsink contacting the digital powerboard on its top.
It's a magiclike cutback in performance for the D200 and I heavily doubt the statement of thermal constrains is the reason because they obviously can not be seen.
I think to justify the difference in acquisition of the both the softwarerestriction is a built-in-design for the D200.
And hey, it's ok for me. The D200 is nevertheless a great performer if not the better one for the money. Carcompanies do it the same way selling the better equipped/motored cars of the same model for much more than the extra costs for them actually are (anyhow, still hoping there is a D200->D250 hack in the future or me could afford one).
gui
"Oh, you can buy the other. But then it is a cost intensive learning process"
berlin