There were a few negative comments a few pages back comparing IT03 to FX850, P1, IM50 and RE400. One common thing is that those IEMs are dynamic drivers only. IMO, BA are unable to produce the organic/full bodied sound of dynamic driver. I have not heard any totl ba iem, so I cannot compared the these TOTLs' mid's naturalness to high end dynamic like IE800, but my guess is that a good dynamic will always sound warmer and lusher than the colder and faster BA. IT03 does sound like a typical BA and listeners not used to such sound may find the sound "hearing aid"-ish. I also agree that the mids sounds more backwards compared to the average IEM out there. But this also give the illusion of a bigger soundstage. After reading a few pages of this thread, I was under the impression that this headphone may be bass heavy. I am abit of a basshead ( I love plenty of full bodied subbass) and unfortunately, I find IT03 are tuned towards neutral instead of bass heavy. I do not find the sub-bass to be heavy at all. There are many other IEMs with more quantity of sub-bass than this. Reading my comments, one might think that this is a mediocre earphone, but this is not the case. In fact, this phone offers good clean music, above average soundstage and sound separation. The sound is abit cold for me, and I wish that it is possible to use a tube amp on this IEM. Initial listening, I do find the sound a little harsh and sibilant. However, all of that is nearly gone after I changed to a third party bigger eartip with deeper canal. Fit is very secure and very insulating to outside noise. Fit is not the most comfortable but I have no problem wearing them for hours without any pain.