check the w3 thread.. to some it maybe an issue.. this is something you also have to pay attention because once u find the sibilance painful on an iem.. you're doomed haha it'll make you skip tracks..
if you happen to do some research, sm3 is a combination of 535 and ie80
no it's not bright like the 535 but has an intimate and liquid detailed mids.. it's not as bassy as the ie80 but has a lot of bass quantity which is also deep and has a huge soundstage and very good isolation
You guys are killing me. :)