Hi, are you saying that the AE-5's bass/audio signature changes after a month of use please? I have been testing it a 2nd day and no matter what I do, the bass is not to my liking. It is not sharp, deep enough. It's mushy, smooth (sorry if I don't use the pro words). The SB Z alone (or with my A30 Topping amp) does a much better job; I use it in Stereo Direct using Front L+R line out with the amp or HP amp out if not. On the AE-5 I have tried HP Direct, HP with EQ, Bass settings, profiles, jumped up few times and stood on my head, nothing can recreate my sound from Z/Z+amp. Lost as not sure to return it or not. Help.