Not like what I hear with the IT04. I hear excellent bass extension with good definition and a large sound stage. I use the medium large bore grey tips and found the IT04 need 150 hours or more for the dynamic driver to relax and really deliver. I have compared them to my customs from JH Audio and they hold up well in comparison to IEMs cost 3 times as much. Tip rolling also affects the feeling in the ear and comfort.
Then don't cover the vent. I have no issue as the tips I use, stock, work well and I insert the IT04 the same each time and get some great sound. The same can be said for most any headphone, regarding placement on the head, angle etc. Find out what works and use it.
The problem is that the IT04's frequency response varies wildly depending on the degree to which the vent closest to the nozzle is covered. This is a frequency response graph showing the difference between completely taped over and uncovered. Depending on the tip and insertion depth I get a completely different sounding IEM.
I don't think you understand: the IT04 requires that vent to be completely covered to get what I assume is the intended, non-anemic bass response. Furthermore, the degree to which the vent is covered affects the upper midrange, which is a terrible design.
Thanks. I recollect IT04 talk about wood, but maybe it was just talk (or prototypes only).
