JustIntonation
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- Jun 20, 2018
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I've just bought a second hand Anedio D2 through Ebay.
The D2 came out in late 2012 and has an ES9018 DAC chip (full version not mobile).
The Anedio company was based in the United States and ceased to exist about a year ago. They used to publish a lot of measurements and seemed like a company which took their DAC design serious yet aimed for a reasonable price. The D2 used to sell for $1500 which was later reduced to $1250.
The old Anedio website is still readable through the WayBack Machine, including some of the published measurements.
Their measurements look fantastic. But perhaps too good to be true!
And there's a discrepancy between the measurements and the published THD+N spec.
Their measurements were done with an Audio Precision system and I was wondering if some people here can shed some light on whether these measurments are possibly real or perhaps more likely to be misleading in one way or another.
Measurements can be seen here:
https://web.archive.org/web/20161206045028/http://www.anedio.com:80/index.php/product/d2_measure
And they come with the following footnote:
"All measurements are performed using the Audio Precision APx525 system. The line outputs of the D2 DAC were terminated with 100Kohms. Unless otherwise indicated, FFTs were 64K points, averaged 4 times, with the AP-equiripple window."
I'm not familiar with the effects of certain settings of the measurement system other than what's published by Amirm, perhaps the above settings can give results which seem nicer but can't be directly compared to the measurements by Amirm?
The discrepancy I found is that for instance the "FFT Spetrum @ 0dBFS" shows all harmonics below -120dB! Not only is this amazing, but the specifications of the D2 DAC state a THD+N of 0.0003% (https://web.archive.org/web/20161206022157/http://www.anedio.com:80/index.php/product/d2_specs) which translates to a THD+N of about -110dB.
Is it indeed possible that for instance the type of measurement and FFT window size and averaging produce for instance about 7dB better measurements and adding the harmonic distortion and noise add another 3dB so the THD+N is not in true contradiction?
Have no real doubt that this is a well designed DAC with a very good neutral headphone amp for the price that I paid. But still I'm curious about the above
The D2 came out in late 2012 and has an ES9018 DAC chip (full version not mobile).
The Anedio company was based in the United States and ceased to exist about a year ago. They used to publish a lot of measurements and seemed like a company which took their DAC design serious yet aimed for a reasonable price. The D2 used to sell for $1500 which was later reduced to $1250.
The old Anedio website is still readable through the WayBack Machine, including some of the published measurements.
Their measurements look fantastic. But perhaps too good to be true!
And there's a discrepancy between the measurements and the published THD+N spec.
Their measurements were done with an Audio Precision system and I was wondering if some people here can shed some light on whether these measurments are possibly real or perhaps more likely to be misleading in one way or another.
Measurements can be seen here:
https://web.archive.org/web/20161206045028/http://www.anedio.com:80/index.php/product/d2_measure
And they come with the following footnote:
"All measurements are performed using the Audio Precision APx525 system. The line outputs of the D2 DAC were terminated with 100Kohms. Unless otherwise indicated, FFTs were 64K points, averaged 4 times, with the AP-equiripple window."
I'm not familiar with the effects of certain settings of the measurement system other than what's published by Amirm, perhaps the above settings can give results which seem nicer but can't be directly compared to the measurements by Amirm?
The discrepancy I found is that for instance the "FFT Spetrum @ 0dBFS" shows all harmonics below -120dB! Not only is this amazing, but the specifications of the D2 DAC state a THD+N of 0.0003% (https://web.archive.org/web/20161206022157/http://www.anedio.com:80/index.php/product/d2_specs) which translates to a THD+N of about -110dB.
Is it indeed possible that for instance the type of measurement and FFT window size and averaging produce for instance about 7dB better measurements and adding the harmonic distortion and noise add another 3dB so the THD+N is not in true contradiction?
Have no real doubt that this is a well designed DAC with a very good neutral headphone amp for the price that I paid. But still I'm curious about the above