You have direct experience with them?
not from direct experience but I know their "philosophies" and their "reputation" but I hope I'm wrong.
You have direct experience with them?
I am happy with mine, though nothing I use it for gets anywhere near the limits explored in any of these tests.Wow that really is a surprise, a lot of owners hold these in very high regard.
Keith
You may be onto something. I found the following description for DPM:There's a setting called, I think, DPM, which does some sort of power management. This might be switched on by default in your unit. I understand most owners prefer this setting off. It could be causing weirdies.
Source: https://www.devialet.com/media/wysiwyg/docs/manual-8-1.pdfDynamic Power Management: The amplifier’s input signal level and the current volume gain allow us to determine at any moment the maximum voltage to be applied to the speakers.For example, with a volume gain at -20dB, the maximum voltage to be applied to the speakers is ten times inferior to the maximum voltage the amplifier can deliver.The amplifier’s electrical consumption, and as a consequence its heating, is directly linked to the maximum internal power supply voltage (which is superior to the maxi-mum voltage required by the speakers) produced by the internal power supply of the amplifier.In order to further increase the amplifier efficiency, the value of the maximum internal voltage is adjusted according to the maximum voltage required by the speakers.Therefore, this supply voltage management allows to maintain the quality of the voltage applied to the speaker and to save energy at the same time.
not from direct experience but I know their "philosophies" and their "reputation" but I hope I'm wrong.
Subjectively, and fully sighted, DPM on seemed to affect the treble with the 200 to me, it seemed softened when on.You may be onto something. I found the following description for DPM:
Source: https://www.devialet.com/media/wysiwyg/docs/manual-8-1.pdf
I remember trying one of the early iterations here and it seemed fine, albeit used with efficient and sensitive horn loudspeakers.I am happy with mine, though nothing I use it for gets anywhere near the limits explored in any of these tests.
Why in God's name would you put something like this in an amplifier?You may be onto something. I found the following description for DPM:
Source: https://www.devialet.com/media/wysiwyg/docs/manual-8-1.pdf
Underwhelming to say the least ... Could it be that this unit was/is defective/ The only way to know would be for Devialet to send a better (cherry-picked? ) one.
I own a Devialet 220. Sounds great. But Devialet is notorious for being unresponsive to emails and in keeping customers out of all loops. They are really terrible in this regard and I have personal experience, and have seen the testimonials of many others. I agree with don't pile on, but I too would be surprised if Devialet responds.Trashing them in pile-on fashion may not be the best way to get them to participate.
Amir, are you using the AUX-0025 filter?
I don't understand the "Class A with a Class D current source". How much of this amp operates in Class A? I'm guessing not much.
Tom
They were fine at first. The web site was simple but technical and easy to navigate, then the LVMH bloke bought shares and the web site became completely hopeless screen candy very hard to navigate.a lot of people in France like me don't have any sympathy for this brand ....their marketing, their very high opinion of themselves
Unless you are a journalist or like dicking about it isn't that big a deal and really harks back to the original device which was configured by and SD card but not over the internet.that lame SD that has to be brought to a PC
The topology is unique to them. It is similar in concept to Quad's "current dumping" but in the digital age.
The class A amp controls voltage up to full power with class D stages (4 each channel iirc) supplying the current under DSP control, the idea was to have the lack of crossover distortion of a class A amp without the size and power wastage.
They were fine at first. The web site was simple but technical and easy to navigate, then the LVMH bloke bought shares and the web site became completely hopeless screen candy very hard to navigate.
If they had had the web site they have today I would never have investigated the technology or bought the original.
I don't expect DSP can be "switched off" without switching the amp off since it requires DSP for the Analogue-Digital Hybrid circuit to work and the power output is configurable (up to maximum) - I don't think that would be possible if DSP could be switched off.
There is no doubt the analogue noise level went up between the D-Premier and subsequent models. They changed the power supply and added more powerful DSP to allow SAM (originally developed for the Phantom) to be implemented and added this model which has the same pcbs but less heat sinking than the bigger one and has a lower rated power max.
I am therefore quite sure that the power is thermally limited on this model and intended to be protected by the DSP. The bigger one may well be thermally limited too, just getting to higher power before the controller steps in.
Darned tootin'.... fur coat no <k>nickers ( though that one has its up side )..