I am sorry if this has been asked before, I did not want to go over 30 pages, it has been some time since I have been lurking around and there are a lot of things to catch up

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Can someone make a comment about hissing with iems? Is hifiman dead silent with even the most efficient iems? I also wonder about its sound signature and how it compares to a d10 (I have a ihp140, which I can combine with d10). I am leaning towards hifiman as of now before the preordering for batch 2 is over, but I need be sure that the player has no hissing issue and the sound signature is close to neutral. Any information is greatly appreciated and sorry if I am being redundant here and asking same questions which have been asked before.