Two points:
1) Turbines of all flavors are very sensitive to insertion depth. This is why I find mine a little frustrating as I have mainly relegated them to times when I am less active. A little movement in or out makes a huge difference.
2) Folks who want even more bass in their IEMs probably should evaluate proper closed over-the-ear headphones. Then, at least, you get more bass sensation on your head without the long-term damage. If I want to feel bass, I don't want it originating from a tiny speaker inserted into my skull (as cool as that sounds)... I want to feel the bass on my body...
edit: The reason I'm saying that last point is because I think "Basshead" means different things to different people. I feel like it is often used to mean "I want a kick in the ears that makes me feel like I'm listening to a subwoofer". Which is probably unrealistic or at least unhealthy.
Edited by RecklessFable - 2/23/12 at 10:21am