Yes I can recall reading this in this forum.https://www.soranik.com/product/mems-2/
Bob said that to fully reveal the sound of the mems you need an amplifier and thought for a long time about how to solve this problem and it seems that he found some kind of solution for the IMR IEM.
I don't know the details.
So maybe soranik is different and needs the diablo xmems dac amp .