Thanks for your comment and all the discussions
About the issues mentioned, we would like to explain a little:
The filter mode design is probably what most of you are confused about. Here we’ll explain the meaning of redesigning the filter modes.
The filter modes are actually very different. It’s just that common frequency response measurement cannot tell that very well.
Let’s first compare ESS IMD Hump in filter mode 2 and filter mode 4:
View attachment 162534
Filter mode 2
View attachment 162536
Filter mode 4
You can see the big difference. And that will be reflected in listening. We reserve ESS DAC original features because for some music IMD will bring different listening experiences.
Let’s continue and compare filter mode 2 and 3. The difference shows in high frequencies harmonic:
View attachment 162537
Filter mode 2
View attachment 162538
Filter mode 3
The power distribution of high frequencies harmonic changed the performance of details at high frequencies. It’ll be more adaptive to different kinds of music.
The AP’s result is the same:
View attachment 162539
Filter mode 2(the reference voltage is 1Vrms, so all level +6dB)
View attachment 162541
Filter mode 3(the reference voltage is 1Vrms, so all level +6dB)
Actually there are a lot more differences of the filter modes of X1s GT. The differences are much more effective in listening than ESS original design. Some might wonder why we use Slow Roll-off. That’s because the sound will be more natural. When designing a DAC, we consider more about the actual listening, instead of merely pursuing numbers in measurement. We believe enjoying music is the ultimate thing.
We appreciate your comment, and everyone's. And we absolutely welcome all of you to share your opinions and advice.
Thanks