Some more of my thoughts on iEMatch, it seems to have drawn a few negative comments on this thread regarding its implementation within the xDSD Gryphon and generally I'm in agreement with this. But there is a but...
In my opinion I should say it depends on a few things, which output is being used, SE or BAL and what is plugged in to that output.
I've been "forced" to use the 3.5mm output as my UE 18+ pro IEM only supports 3.5mm and listening without the iEMatch it sounds good but then I switched it on and wow, after cranking up the volume, this sounds good, better, smoother, a more engaging listen certainly.
UE18+ pro has a quoted impedance of 37.5 ohms @ 1kHz.
We know iEMatch affects the sound balance, fact, but it can affect the sound in a good way. With the UE 18+ pro and I don't have a way to measure this, but it seems just the right part of the audio spectrum is attenuated, the upper mids are enhanced the soundstage pops out, its like a fixed EQ enhancement for that particular IEM.
Matching source to output is vital, call it synergy or whatever but I like what I'm hearing with this particular IEM and iEMatch switched on.