I just bought a pair of Shure SE215's from my local retail store earlier today. I plugged them in and played some music, and I was impressed as to how clear they sounded in both the high and mid range. However, I am not noticing any bass whatsoever. I may get punchy bass (sort of), but the low end stuff is simply not there (I can't hear the bass in dubstep for instance). When I break these in will I start getting better bass? I've got a good seal going on, I'm using the small silicon ear buds so I'm not sure what's going on.