to be honest if you say from the beginning that you see no difference for the mobile Dac’s.
Then it honestly doesn’t matter what you take for you.
Only the technical would be important to note that it plays at least on 16/24 bit and 96 khz would be the minimum. If it is still 192 khz it can also be okay. But everything that’s about it is just marketing, to help the cow To name.
I don’t really want to go deeper DSD is certainly great and an experience, but nothing more, that says everyone and everything that goes above 192 khz, many listeners couldn’t tell the difference, between 96 khz and 192 khz, but rather only one Handful of people.
Everything that goes over it is probably also needed for DSD.
Another thing is again the source of the music, file format, resolution, quality ect ect.
As long as the Dac meets the standard 16/24 bit and can convert between 96 and 192 khz, that’s okay, it doesn’t need much more if you want to be mobile anyway, and that’s better than what the cell phone can do, where only a maximum of 48 khz The only difference is that the Dac improves the signal and resolves it better if it can upscale, which would still be important when buying.
if only information is given that it only plays up to 192 khz then this is the maximum resolution. That means in reverse you have a file that plays back 48 khz then the Dac plays it because it has no upscaling. With upscaling it calculates you the file is as high as you have set it or programmed in house, so you will not hear any difference because your Dacs are not upscaling, that would be an explanation.
You would hear a difference between 48.96 and 192 khz. Especially in the 48 khz range to 96 khz you can hear it clearly. At 96 khz to 192 khz you have to listen a little more sharply. But you hear it, but then it stops at 300 I don’t hear anything upwards anymore, for example, DSD is a completely different kind of musical experience, the question is whether you need it, I personally am not because the differences are quite small for me I tell it to me It is not worth spending more money on streaming providers who are only out for the money. And a lot of titles, especially the older ones, are hardly there if they sound a bit unemotional to me and break it more than what you experienced in childhood, for example. But that’s another story and my view of it. See if you can set the Khz and bit depth on the mobile phone. For example, on the PC, just set the maximum resolution and listen again. If then standard 16bit / 48 khz was set and you could change you will hear the differences for sure.