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My apologize for the mistake !

What DAC chip does this device use ? An ESS, I guess ?

I have never understood why, when dealing with so-called "consumer audio level" and so-called "pro audio level", one has to mix up two different scales, dBu and dBV. Why not just saying : pro audio level is + 4 dBu and consumer audio level is -7.78 dBu, or pro audio level is 1.78 dBV and...

The DAC100 has been tested and measured by the German magazine Audio, issue 08/2010 (back issues do surface from time to time on Ebay). From the published FFT, I have calculated a THD over H2 to H5 of about 0,057 %. Thus, performance is on par with the DAC200 despite the fact that the DAC chip...

To my mind, the harmonic distortion spectrum of 1 kHz fundamental tone (2 kHz, 3 kHz and so on) are the actual linearity performance of the discrete output stage. Numerous third parties measurements of digital and analogue products built by Atoll show the same type of spectrum. It can be safely...

I do not forget : I'm myself a Frenchman. ;) The problem jipihorn identified was primarily due to full-wave rectified power supply residue. Full-wave rectification from 50 Hz mains produces 100 Hz. That being said, the presence of 35 and 40 Hz spurious frequencies is puzzling because, as you...

Question to jipihorn : Don't you think the 100 Hz spaced side-bands visible before and after the signal on the FFT of the DAC200 (the pictures labelled "THD+N") in the opening post look suspiciously alike those you have observed by measuring a kit implementation of the earlier ESS ES9018 in one...

By the way, for those who don't know jipihorn and are fluent in French, checkout his Youtube channel and blog : https://www.youtube.com/@jipihorn/videos https://jipihorn.wordpress.com/ Highly recommended. ;)

I'm perfectly aware that in the French legal system, in which there are three levels of offenses (from the less severe to the most: "une contravention", "un délit" et "un crime"), misleading commercial practices are classified as "un délit" (Article L. 121-2 du code de la consommation), but...

Spot on. Especially in France, where misleading commercial practices are criminal infringements.

Audium, the German distributor of Atoll, has a webpage which indexes reviews of Atoll products by titles of the German hifi press, of which two of them, Stereoplay and Audio, do publish measurements made with an Audio Precision. I suggest to download those reviews and check the measurements ...

Good (load of...) works. What the measurements show is, IMHO, plain analogue stage non linearity and poor power supplies by modern standards. No huge surprises considering the obvious use of very simple discret analogue stages where more elaborate circuitry should be mandatory for the tasks of...

Difficult to tell, because, per the comments visible on the FFTs disclosed in this video, A weighting was applied during the measurements. This type of weighting could mislead the evaluation of the noise or distorsion performance of an amplifier and, in any case, weighted measurements are not...

Are there scratches on the front plate ? Is the front finishes that fragile ? If it is the case, a general comment or informations about the overall quality of the hardware would be a welcome addition to the review.

I think the test disc is Denon Audio Check SACD (COQG-28). In this case, for the sake of precision, the sinus test signals are recorded at -16 dB SA-CD (exactly the same level as the -16 dBFS test signals in 16 bits PCM on the CD layer of the same disc).

I think you are mislead. While digital signals do indeed have clearly defined dynamic range boundaries, you fail to recognize that the upper limit of this dynamic range (the 0 dBFS or +3.1 dB SA-CD for that matter) could very well be aligned on a very high analogue level (be it electronic or...

I highly suggest you try to master this new piece of equipment in order to keep it. :) In France, a famous engineer, Étienne Lémery, who has passed away for some years now, had devised an analogous test method for power amplifiers in the eighties. His lab results were essentially published in...

Of course, but the goal of Head_Unit's proposal is obviously not to determine what an amplifier is capable of, but to help people become aware of the fact that his amplifier might sometime enter into clipping by listening his music because said amplifier may be under-powered for the job . As I...

Of course, but the whole point made by Head-Unit is the give anybody who don't have a scope a rough idea about possible clipping in his power amplifier.

The 0 dB SA-CD and peak output DSD signal are defined in the Sony+Philips document "Super Audio CD Audio Signal Properties", version 1.3 from March 2003, annex D, §§ D.2 and D.3, which are mandatory to the format. The document also contains recommendations (annex E). One is that bi-format...