My favorite IEMs in no particular order. I no longer own most of them, so I may forget and miss one or two:
Etymotic ER4S - thin sounding sometimes; need to be inserted very deeply, so not very practical for everyday use; sometimes too revealing; a bit bass shy.
Etymotic ER4P - upper mids can sound harsh; not as transparent and refined as ER4S;
JVC FXT90 - a bit sibilant; a little rolled off in the upper highs; a rather narrow soundstage; mid bass can have a mind of its own;
Phonak PFE 012 with grey filters - a resonance peak between 7-9 kHz, causing sibilance and harshness sometimes; resolution is lacking compared to ER4
Etymotic HF series - a little muddy sometimes; bass lacks depth and presence in the lowest lows.
Ortofon e-Q7 - somewhat crude highs that lack extension and refinement;
JVC FX700 - excessive mid bass emphasis; distant mids;
Hifiman RE0 - narrow dynamic range; highs are a little too bright and harsh; can sound muddy with a bad fit and/or improper amplification;
Hifiman RE262 - a little too warm at times; a somewhat bothersome treble peak;
Q-jays - a large, unnatural dip in the lower highs/upper mids; highs are a bit "dirty"/lacking clarity; bass response is very fit dependent;
Quote:
Etymotic ER4: Microphonics. Dynamic range. ..And all other things that people already talked about in this thread.
There are IEMs with better dynamics than ER4 I think, but ER4 makes up for the dynamics that it lacks with its insane speed IMO. Overall, I find ER4 to have a sufficiently broad dynamic range. Examples of IEMs that really do lack dynamics are RE0 and DBA-02.
BTW, I forgot to include Ultimate Ears 600 in my list: they lack some dynamic range and the highs are not very detailed and a bit harsh