They definitely aren't lacking in bass quality, they do sound like they lack quantity because the headphones are brighter, but the quantity is still actually quite high and more than enough for many genres. No, they may not be enough for rap and dub step, but they are sufficient for many other genres. Like stated above, if you do a treble reduction EQ (I'm using the one on my iPod), you will hear what I'm talking about. The bass took about a week and a half to really grow on my.
This comparison was done this time with:
- B2s + treble reduction EQ on iPod (this EQ doesn't touch bass, there was no volume adjustments)
- XE200s (unless they have randomly turned into BAs)
Granted, you are right, XE200s have much more quantity (at least 3-5 dB more), but the quality is about equal and more than sufficient.
Both headphones are running at 5 notches (5/16 or 31.25% of the total volume on my iPod)