Audio Science Review of Expert 200.

[petrik]

Amir has reached out to Devialet for a response.
There are questions that could easily be cleared up but I wonder if they will be as woefully uncommunicative on this as they are with pretty much everything else….

Since the device is not under warranty, does Devialet really need to respond? How many other manufacturers would respond to similar requests?

Someone on ASC posted the following links for 170 measurement. It's the same hardware. Registration is required to read these report.
This seems to be pretty comprehensive tests, but done only at 1khz.
http://www.milleraudioresearch.com/downl...t_170.html
http://www.milleraudioresearch.com/downl..._lpcm.html
http://www.milleraudioresearch.com/downl...0_usb.html

On the other hand, its about time for Devialet to explain if their units are tested for full power using multiple sign waves. Many people do refer to Stereophile's measurement of original D-premier. I thought that would have been taken care of in last 8 years.

These are good links from @sam1000

For anyone interested, the registration that is required to view the measurements is free, click the "registration" button per the link below:

http://www.milleraudioresearch.com/avtech/index.html

(note the comment: Javascript must be enabled in your Browser to activate the Registration button.

Measurements for the D-Premier can also be found there:  (Nearly 10 years old now.....)

http://www.milleraudioresearch.com/downl...nput).html

http://www.milleraudioresearch.com/downl...nput).html

I know Paul also tested the O'dA, I would have been interested to see these but unfortunately the website only seams to show measurements up to 2014, the Od'A review was March 2016:

http://designwsound.com/dwsblog/2016/03/...hare=email

Mindful of the recent posts here, I am sure we can all agree that Paul Miller has a touch more expertise with audio measurements than I do.  When hunting for other things I found this, it looks like Paul uses Devialet amplification in his own listening room.  (Devialet for 2 channel, Krell for 7 channel AV)  So whatever he has found in the measurements, it seems Devialet is good enough for him.

https://www.hifinews.com/content/paul-miller

Thank you for sharing the links. There seems to be some significant differences between the Expert 170 and the D-Premier measurements, but I don't know are the results comparable. Any ideas what do those "FAIL" parts mean? There are lots of those in the Expert 170 measurements, but only one in D-Premier.

I'm just thinking what might explain the differences. Do these devices really just perform differently, or could for example differences in settings / configuration explain at least part of the results? I'm not sure did the D-Premier have features like SAM, DPM, or ICM which the Expert 170 did have.