Low Sensitivity IEMs?

[Zim]

Currently looking for IEMs with low sensitivity so I can have a little more control over the volume. What are the options out there?
So far, the least sensitive ones I've found are the 7Hz Dioko at 106 dB/V (88 dB/W)


U-Sound/Harman-Curve-ish options and higher impedance (i.e. above 30 Ohms) options are a big plus.

 

[MRC01]

Etymotic ER-4S? They've been around for decades, great measurements, and fit most of your requirements.
They have the Etymotic "house sound" which has an upper midrange emphasis compared to Harman. But they have such low distortion, you can set any curve you want with DSP / parametric EQ.

 

[dc655321]

You could attenuate digitally. That would give more analog headroom.

 

[staticV3]

The Russian measurement site Reference Audio Analyzer has measured more than 750 IEMs including impedance, sensitivity, frequency response, etc.
Here's all their IEMs sorted by increasing sensitivity:

Characteristics of headphones - Reference Audio Analyzer

reference-audio-analyzer.pro

If you want more control, also consider attenuation adapters.

Are you dead set on a specific Amp?

 

[maverickronin]

You could also look up the various iFi IEMatch adapters to reduce sensitivity.