I second what @333jeffery wrote in response to your post. I’ve quoted it here since it is further back in this thread.
"The DI’s sound is highly dependent on what you have hooked to them. I went through two different amps and three different preamps to finally get the sound qualities that were most pleasing to my ears. They are very revealing. That said, they never sounded bad with any of my equipment, just emphasized different aspects of the recordings. For example, with a powerful solid-state amp they exhibited wonderful dynamics, whilst a tube amp give them wonderful texture. Changing preamps added and subtracted details from the music. I will say, however, that the midrange stayed nice throughout my equipment changes, just minor improvements here-and-there."
I’ve run the DIs with two different DACs, two preamps, and three different amps. In each case the DI is able to showcase the personality of the chain. I will be adding a third DAC/Pre to a fourth amp (HT components) and should have a feel for that combination in a couple of days.
To your points, there is"’proper tone," lovely in fact; "refinement"; "a sense of ease"; "warmth"; and "a lack of brightness" (which I am very sensitive to).
The best chains (so far) for my preferences have been the Exogal Comet - Ion which delivers big on ease and refinement; and the Schiit Yggdrasil - HeadAmp GS-X Mk 2 - Moon Neo 330A.
I find the Yggy - HeadAmp - SST amp combination slightly bright, but with great body, weight and fullness in the mid to lower range. This is likely due to the pairing being one of 'too much alikeness.’ I added this component combination yesterday and it definitely needs more play time before I know whether the slight brightness remains. The same component pairings worked exceptionally well with my Gemme speakers.
Hope this helps you and others considering the Electron or DIs.