I have to agree that these are more of the musical Monster earphone style sound while the FX101 is less colored more flatter sound. The imaging and depth is very nice on the FX3X. I will not give the verdict quite yet until I hear some improvements in the upper registers. While it doesn't bother me much as I am more tolerant of these frequencies than most but I can clearly make out the peakiness.. For guys that are less sensitive in this department the bass on these are as close to a real sub woofer sound as I have heard. Textured bass on the high quality more than most earphones. The bass is big n brawny while maintaining a tight control in the sub bass region. Similar to the FX40 bass but about X2 more. Lol!
I will have to do some A'Bing against the other bass earphones once these burn in for a while.