A Confused streaming system - Mutec / SOtM Ultra

[Blackmorec]

May be because the SoMT adding extra resolution on top of the Devialet? Because I think Devialet not warm sounding amp, its bit sharp/bright, it is OK if the speaker matched well. I found this in my system, when I upgraded the speaker, it break the balance... sometimes too much resolution is not a good thing.

With respect, the Devialet is neither sharp nor bright. Its virtually 100% transparent to the signal with which its presented, so if the signal coming in is at all sharp or bright the Devialet will reproduce that faithfully and will not editorialize, round or enhance the signal in any way.  But, like any audio component the Devialet is influenced by its support device. Put a Devialet on cones if you want it to sound more pinpoint, sharp and yes, analytical. But mounted on a neutral support, the Devialet is exactly that, neutral  and entirely transparent. This is a good thing because as long as the rest of the system is performing well, the Devialet will not add or subtract anything.  In my experience, hardness or brightness in a system is most usually caused by an imbalance in the system's resolving abilities. As an example, take a highly resolved signal and pass it through a cable that smears the signal. The 'lost' information that goes into the cable doesn't simply disappear, it comes out, but is now smeared and combined with other parts of the musical signal as distortion. In my experience, the area most affected is the air and ambience around instruments. which is typically what's lost when resolution is less than optimum. As this is all high frequency information, you are combining this high frequency energy with the same frequencies associated with other parts of the music, causing the system to overemphasise those particular frequencies.  This comes over to the listener as hardness, brittleness, brightness, sharpness etc..... simply an overabundance of high frequency energy.  Whenever you replace a component in a system with something that resolves more high frequency detail, like air, ambience and decay, the system always sounds at the same time more sparkling, shimmering and natural, with less harshness or hardness in the treble.