Consistent
Member
Great Job...I just purchased the unit and read that 3 or 7 are the best modes but my listening revealed 5 was best and there it lies!
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Topping D90SE Measurements (DAC)
- Thread starter VintageFlanker
- Start date
Another set of stellar measurements for the D90SE:
hometheaterhifi.com
Topping D90SE DAC Review - HomeTheaterHifi.com
The Topping D90SE DAC continues the company’s tradition of offering objectively high-performance audio products for reasonable prices.
hometheaterhifi.com
IVX
Major Contributor
OMG, H3 at -100db, seriously? It should be the worst 90SE ever.Another set of stellar measurements for the D90SE:
Topping D90SE DAC Review - HomeTheaterHifi.com
The Topping D90SE DAC continues the company’s tradition of offering objectively high-performance audio products for reasonable prices.
This is my D90SE measured with E1DA grade 0 in stereo mode.
THD:
IMD:
Crosstalk:
IMD swept:
And something out of this world (custom test):
Crosstalk for 96 kHz up to Fs/2 (some rise below 100 Hz is probably caused by DC offset of the E1DA):
Last edited:
IVX
Major Contributor
Are you speaking about the dB FS levels of the generated signals and the subsequent "normalizing" of the output levels? I think it's true. It has some options, but I don't think it is possible to adjust accurately in "automatic" mode to match more flexible devices and/or software.
But RMAA is widely used, it is thing on its own. It allows to compare devices measured with RMAA taking into account some details. You need to understand details anyway, no matter which tool you use.
You can see, I have -119.8 dB THD+N here. And this is limited by the noise of E1DA. If I run this test in mono mode I can get -121.7 dB THD+N, which is actually very close to the results of Amir.
But this result is not so accurate anyway, because it is noise-dependent.
So, you need to understand what's going on anyway unless you are doing something like this (even AP has 123 dB of SINAD, while in this topic it is 127 dB):
https://www.audiosciencereview.com/...measurement-with-e1da-cosmos-apu-notch.35288/
BTW, the current topic started with RMAA measurements. And the results are comparable, taking into account the different grades of E1DA.
Well, you were probably looking to the 16-bit/44kHz measurements, but if you look to the 24-bit/48kHz measurements you can see that 3rd harmonic (-110dB) is at a distance of about 120 db from the fundamental (+10dB) and the final SINAD is 118.2 dB which is OK given the QA401 measurement device used.
Another thing about the crosstalk of D90SE.
This is crosstalk of D90SE with E1DA @ 4.5 V, 1.66 kOhm:
This is crosstalk of D90SE with E1DA @ 6.7 V, 2.46 kOhm:
The result is the sum of the signal and the noise at the corresponding frequency, so at 4.5 V the graph is slightly lower in the middle.
But after 10 kHz there is a difference which is not the noise, but the signal from another channel.
The recorded test signals were level-matched before analysis.
This is 30 kHz -0.1 dBFS tone in the left channel recorded @ 1.66 kOhm:
(this one is -0.6 dBFS actually because the input were slightly overloaded, but the result is the same)
This is 30 kHz -0.1 dBFS tone in the left channel recorded @ 2.46 kOhm:
This is crosstalk of D90SE with E1DA @ 4.5 V, 1.66 kOhm:
This is crosstalk of D90SE with E1DA @ 6.7 V, 2.46 kOhm:
The result is the sum of the signal and the noise at the corresponding frequency, so at 4.5 V the graph is slightly lower in the middle.
But after 10 kHz there is a difference which is not the noise, but the signal from another channel.
The recorded test signals were level-matched before analysis.
This is 30 kHz -0.1 dBFS tone in the left channel recorded @ 1.66 kOhm:
(this one is -0.6 dBFS actually because the input were slightly overloaded, but the result is the same)
This is 30 kHz -0.1 dBFS tone in the left channel recorded @ 2.46 kOhm:
UPD.
The crosstalk at -127 dB for 30 kHz looks like some kind of signal cancellation.
Probably my E1DA has very close crosstalk for 6.7V with the inverted phase relative to D90SE.
And the crosstalk of 10V mode looks like the crosstalk of 4.5V mode.
I checked this manually by loading one channel with ~2.5 kOhm and recording the signal
of another channel with the different device with ~2.5 kOhm too.
I used 20 kHz test signal and got the same -117 dB crosstalk for both L->R and R->L.
And this is the graph with another ADC (Lake People RS04 recording both channels) to support the idea:
So I suppose the crosstalk measurements shown here are good:
https://www.l7audiolab.com/f/topping-d90se-d90le/
After spending some time with E1DA I think it is not as good as it seems.
At least it requires close attention because it hides lots of surprises
The crosstalk at -127 dB for 30 kHz looks like some kind of signal cancellation.
Probably my E1DA has very close crosstalk for 6.7V with the inverted phase relative to D90SE.
And the crosstalk of 10V mode looks like the crosstalk of 4.5V mode.
I checked this manually by loading one channel with ~2.5 kOhm and recording the signal
of another channel with the different device with ~2.5 kOhm too.
I used 20 kHz test signal and got the same -117 dB crosstalk for both L->R and R->L.
And this is the graph with another ADC (Lake People RS04 recording both channels) to support the idea:
So I suppose the crosstalk measurements shown here are good:
https://www.l7audiolab.com/f/topping-d90se-d90le/
After spending some time with E1DA I think it is not as good as it seems.
At least it requires close attention because it hides lots of surprises
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