OK this may be a bit controversial, remember too this is my ears here, perhaps not the best pair out there but at least they aren't tiny.
The Etymotic ER4XR when driven by the N6ii, sounds great but it sounds great out of my Sony ZX300 (I tried to do a fair comparison) and most other things I plug it into, there is no incremental change or improvement like there is with the SE846 and N6ii pairing, there I said it.
I would draw the conclusion that being a single BA most HQ sources are able to push the ER4XR to its resolution limit. I think its a considerable plus for the ER4XR that to get a great sound from it I really don't need to spend a lot of money on a TOTL DAP.
Here's a picture of the pairing.
The Etymotic ER4XR when driven by the N6ii, sounds great but it sounds great out of my Sony ZX300 (I tried to do a fair comparison) and most other things I plug it into, there is no incremental change or improvement like there is with the SE846 and N6ii pairing, there I said it.
I would draw the conclusion that being a single BA most HQ sources are able to push the ER4XR to its resolution limit. I think its a considerable plus for the ER4XR that to get a great sound from it I really don't need to spend a lot of money on a TOTL DAP.
Here's a picture of the pairing.