So far for ER4SR, ER4XR, and my ER2XR, I use the stock 3 flanges ear tips that comes with it. Fit just fine for me.
Well this is what bothers my mind, that I cannot communicate that 'dryness' aspect when talking about sound quality. So far I suspect short and long decay, or odd harmonics. But I have no way to prove it or measure it. I just want to know I heard from all these IEMs that I have and communicate it as clear as possible when people ask about sound quality. But it seems the language of sound is not that universal after all
I tried to observe the Impulse Response of my measurement just to see it makes any sense. For example, here are 4 IR measurement of the following IEMs:
DIY Knowles ED29689 (BA driver used in ER4S & ER4P) - 1 BA IEM: It sounds dry to me.
Tin Audio T3 - Hybrid IEM: Also sounds dry to me
1964 Ears V3 universal (old discontinued model) - 3 BA IEM: Sounds fine to me
Moondrop Crescent - Dynamic driver: Definitely not dry sounding
I observe the T30 value of the IR measurement in REW:
DIY Knowles ED29689: 0.027 s
Tin Audio T3: 0.019 s
1964 Ears V3 universal: 0.053 s
Moondrop Crescent: 0.067 s
It is too early to make any conclusion, but from 4 IEMs above, IEM with the shorter impulse response sound dry to me.
DIY Knowles ED29689:
View attachment 56301
Tin Audio T3:
View attachment 56303
1964 Ears V3 universal:
View attachment 56300
Moondrop Crescent:
View attachment 56302
Sorry OOT. Probably need to make new thread to discuss technical measurement of In-Ear Monitors. I guess I stop here for technical discussion.