I bought IE80 from a friend. They are 100% genuine. I have them for a week now, but they still does not sound good to me (in the price range they sell). To me they are too bassy (even with the lowest bass option) which would not be so much bad, but to me they are just so muddy. They just does not sound clear enough (for a bassy headphones). Well I was using Vsonic GR01 for past few months, that are bright and detailed, but I wanted something more fun to listen, mostly for electronic music. And yes, they are listenable for electronic music, but I just expect more. IE80 are just not right for my taste.
Any suggestions for bassier headphones in 250
$ price range, but they are not muddy? I think about T20? Maybe even DUNU DN2000? Well basically dynamic or hybrid headphones should be OK for my use.
look at the frequency response graphs of the IEMs where you enjoy the low end, and same thing for the IE80 and other IEMs where you were dissatisfied. and try to find a pattern. it's your taste, only you will know when you get what you like. some like tight bass mostly boosted in the 80-100hz area, some like a little bump in the 30-40hz, some like a steady rise, etc.
maybe what you interpret as a bass problem is a medium problem? did you try the "tape mod" how does it feel?