Was lucky to get the chance to try the Mezzo Soprano mods at Amplified Head (Malaysia) courtesy from Music Century (Singapore) as they were kind enough to bring some demo sets including CIEMs
CIEMs tested:
Lime Ears LE2 & LE3SW
Noble K10 & Noble 4
1964Ears V6 & V6S
Btw, this is not a review - just a very short impression since i only had them for around 2 hours.
The AK240 is mine, while the MS-AK120 and 100 are the demo units. I only tried the MS-AK120, so i won't be able to comment on that. The MS-AK120 sounds very good, and i dare say the SQ performs on par with the AK240 but with a different sound signature.
Soundstage wise, they are very similar... perhaps AK240 is a touch airier while MS-AK120 has a touch more depth.
Clarity, micro details, transparency are similar to me. However the sound signature as i mentioned is quite different. AK240 is towards the bright neutral side while MS-AK120 is slightly warmer and fuller sounding. Bass impact on MS-AK120 is more prominent and hits harder and more resounding.
For the CIEMs i tested,
Soundstage wise: Lime Ears LE3SW > 1964Ears > Noble K10
Clarity/Micro details: Noble K10 > 1964Ears >= Noble 4 > Lime Ears
I was quite surprised given Noble 4 price tag, the SQ performs very well. However i found on certain genre/tracks, i didn't like the sound, e.g. on Michael Jackson - Thriller DSD, the Noble 4 sounded shrilly/thin/unnatural.
Given a choice, if i had to walkaway with only 1 CIEM, i'd pick 1964Ears V6/V6S as the best all rounder among all the genres i've tried.