Just to let everyone know that, I bought the Aurisonics AS-2 and just got it today.   For those who are looking for SUPER bass IEM, AS-2 is the one.  I mean, I have to adjust the bass port so that it won't hit so hard.  The 15mm dynmaic driver + open vent adjustable bass port makes you feel...

Quote:   I am not sure about this.  The bass as well as sub bass of FXZ200 is pretty week.  It can't even rumble on low sub-bass music.  You can hear the beat but the bass is not as solid even compare to JVC CKS1000.  You can't feel it is pushing the air with sub bass on FXZ200.   In...

see this post  http://www.head-fi.org/t/651284/the-top-tier-usd-300-bassy-enough-basshead-iem-list     We are searching for the same thing.

Quote:   I am not saying FXZ200 is not a good earphone, but the bass quantity is indeed lacking when it is compared to other IEMs in the 2nd list at the original post.  For example, although the size of the x10 is really small, but you can "feel" the bass is hitting you, you can feel the...

I have been trying to search for the best basshead IEM for a while.   I am looking for a earphone that gives the MOST quantity of bass as well as sub bass rumble without using an amp.  I have tried quite a few IEMs, the following (supposed to be basehead recommend IEM) do not give me enough bass...