(09-Feb-2016, 17:30)yabaVR Wrote: 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
I can see your point. The thing about talking to the Devialet guys is that they are VERY cautious about what they say. They are very good at repeating the party line around their advertising slogans, but specific technical answers to specific technical queries are usually answered in a somewhat obscure way. It should of course be remembered that the D250 case is the original design, and the case for the D200 is the result of Devialet redesigning to make a more affordable amplifier. But why specifically does to D250 have better cooling? I would like to know. Does anyone know?
I take Antoine's point about the higher mass case, but once the case itself is fully hot, I can't see that this helps much? (Although I am not a specialist in heat transfer)
Back on the topic of the Original d'Atelier, the HFN review repeats the Devialet party line "the Original d'Atelier milled-from-solid casework is culled from a solid billet of alloy, affording it better heat sinking over the slimmer 120, 200 and 400 models". I presume an article published in a prominent UK magazine will be fact checked by Devialet? The questing is, exactly why does the case improve heat sinking so much.
Any thermal experts out there know?
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