First off while the midbass levels are nice on these the bass just felt damped and cut at the lowest tends. From my experience with vent modding I decided to fiddle with both vents.
Simply put blocking the top vent reduces bass and blocking the nozzle vent increases bass, especially subbass. I have covered both vents and placed a pinhole on each and the bass is way better than stock IMO. Treble also seems to change but not quite sure yet, seems less sibilant
Edited by Inks - 7/1/14 at 5:43pm