I know i must have a bad pair or i'm insane, i hate too much bass. I must give shure a call, then i'll update my review.

my 425 had slightly excessive bass. (compared to most iems seeming rolled off )

I hope that it does turn out something wasn't quite right - and that Shure replaces them with a good pair (I've found that their service is pretty good). The 425's are genuinely a nice and very underated IEM in my opinion. I really hope you get a chance to enjoy them!