Those are the kind I use. They try to be flat but there's really nothing you can do to stop concert level bass from getting through, so they end up being a bit

Those are the kind I use. They try to be flat but there's really nothing you can do to stop concert level bass from getting through, so they end up being a bit boomy. I've found that I can move them in or out of the ear to adjust the dampening. If they are in too far I tend to not like the way it sounds. I like it at the most minimal dampening I can get. It sounds good and it still keeps me from getting concert-ear. Also I've noticed that I can hear the music much better with them in (when it's too loud I have a hard time distinguishing pitches—singers often sound like the Chipmunks) and some groups don't fare well when you turn down the volume a bit (they use volume to mask lack of ability).