I've posted this question in various guises but never received a response. Basically I have a new CIEM that doesn't satisfy me sonically, I am wondering if it is the CIEM itself, the sources, or the music which is causing the problem.
Usually use a Clip+ and noticed the CIEMs sounded 'muffled' on some music and especially narrative on an audiobook. I had to raise Treble by 10 points on rockbox to correct the sound. So I returned the CIEMS and after some months received new ones.
Same problem. I have also tried them on G2, B&W M-1 and Naim Uniti.
Some tracks sound really good, but I am not sure if the advance is because of the superior quality of the mastering of the track (i.e the CIEMS are letting me notice the flaws in suboptimal track) or they're less treble reliant and so don't flag on the muffled filter.
I really need a good method to determine if I should a) try and return CIEMs again b) get a new quality source like X5. I have spent some hours comparing tracks but seem to be going round in circles.