I thought I would post this here as well as the SE846 thread since it is about how these IEMs pair with the AK120.
Got the SE846 late last week. This is not a review but a quick observation. My main player has been the AK120 and with this pairing I was not happy with the sound. There was extra bass but I thought that was part of the ES846 sound. What really seemed off is that the vocals were harsh in most cases. The vocals were the reason on many songs I would turn the volume down. Since the AK120 has output impedance of 3.3 ohms I thought this could be the source of the issue and I think I was right. I switched to my older RWAK100 which has OI < 1 ohm and the sound is much more balanced. The bass is still strong but not too exaggerated and best of all the vocals are normal again.
So I think the low impedance of the SE846 is going to make one's choice of sources somewhat limited (I have not had issues with any other IEMs straight out of the AK120 such as the WR4 or IE800).
Note: I tried the SE846 on the AK120 via ALO MKIII amp and it was better than straight out of the AK120 but not as good as the RWAk100.
I might have to sell them or get the RWA mod for the AK120.
This is very helpful as I am looking into the ReMK3-B+ and the SE846 myself. My UE900 sounded bloated but my SA7 became more balanced with the AK120... Please let us know if you do decided to sell your SE846 as I bet someone here would like to pick it up on a discount.