I'm guessing you haven't read the thread because they seems they are actually looking for the bassiest IEMs they can get
Also bassiest would have to be something like... Hippo VB -> Digizoid ZO2 (cranked to da max) -> Fiio X3 (eq all the mids/treble down to the lowest setting and eq the bass to da max)
I just joined in since it had already been resurrected and covers a different topic (but it is closely related...I'll give you the). Also, I've already been participating in the thread you linked The bassiest iem I've heard is the SUR. That's what the title asks for.
The Klipsch IE10s have excellent bass and excellent sound isolation for those who can get a seal with the available tips. Their mid frequencies can get muddled and it the distortion I have measured is higher in the mid frequencies than in the low. However, these headphones don't have low bass or ultra low bass. Translated, they have excellent bass down to two octaves below middle C, the output drops for the next octave and isn''t there at all below 32 Hz. I have two other IEMs that have excellent response below 32 Hz, one is no longer manufactured, however, and the other has it''s own built-in DAC (Z:ero Digital Earphone by Zorloo), the point being that ultra-low bass output is possible for IEMs.