Originally Posted by audionewbi
This is really interesting, mine also has a distortion that is very audible at louder volumes. I just thought this is to do with the nature of the IEM. Mine tend to be fixed when I blow hard into the IEM. It is okay but after 20 minutes of usage it comes back again.
I think I need to send mine back to get checked out too but the problem is I once send my EQ-5 back for the same exact reason and never got a replacement unit back and I just couldnt be bothered to follow up on it.
Well, my replacement e-Q8 has landed, and to my utter bewilderment it shows the same tendency to distort as my first pair, only a little less pronounced. Not sure whether it's technically correct to call it a distortion, actually, but there's some kind of resonance or ringing in the upper mids / lower treble that gets exacerbated with certain music. Thing is, the e-Q8's tuning is very forward in that range, and music with a lot of energy there seems to make them virtually go overboard at higher volume levels.
FWIW, here's an example, a highly dynamic piano piece that makes the issue clearly noticeable on both my former and current pair. Play at mid to high volume:
I don't have the e-Q5 anymore, but neither the e-Q7 nor the GR10 (both moving armatures, like the e-Q8) exhibit distortion / resonance with this track.
At this point, I'm rather unsure of how to proceed. Dimitri (of MusicaAcoustics) has gone out of his way to get me this replacement, even though (due to some unfortunate communication problem) I had not bought my original e-Q8 from him. So, huge thanks to him for his help and stellar customer service as always, but sadly the new pair fares only slightly better and isn't free of distortion / resonance either... which, together with audionewbi's report of similar issues, makes me think that the issue may be more widespread than I initially thought.