"HEY, where do you think you're going? We still have Romeo and Juliet to get through yet! Get back here!"
The 215s were good in my books, but not great. I don't think they would satisfy every basshead. They did, however, respond very well to EQ. I also didn't like the cable much, but other than that, found them quite comfortable. I haven't tried the IE80 before, but that bloat looks impressive, and now I'm interested.
Added - thanks mate! You've been credited at the bottom of the amp section of the OP post.
The SE215 is a single driver dynamic, the SE425 is a dual balanced armature.
Agreed - hybrids are currently (in my books) the kings of IEM bass, when they are done right. Stuff like the AX60, H300, even the older Super.fi 5 EB (that I never tried unfortunately) was a hybrid dynamic + BA.
I love the way most hybrids respond to EQ. Very little muddying, distortion, or struggling. Just clean, dominant bass.
The output impedance issues, however.. *Pulls out hair*