Wait, IE800 is too bright? It has a major 8db bass boost... That's means that there should be more bass than UE900, and there is indeed much more bass on IE800. Are you sure you got a proper seal? Also, if anything was blocking the bass port(the two holes), that could significantly reduce bass.
I am pretty sure I got a good seal and nothing blocked the bass port. I do find the IE 800 bright... Or is it it didn't get enough burn-in? O.o I actually spent more time on looking at this tiny little IEM than actually trying it. I was supposed, to try it longger but the bright highs is just too piercing to me. I took it off after half of the song played.