Sorry, the normal volume high's to mids are fine!
The mids > lows are where im not happy! The first thing you notice at low volumes is the complete lack of bass. As you turn the volume up, the bass doesnt really increase and distortion very quickly kicks in.
It also seems to be fickle in the succsefulness of the bass reproduction. Listening to certain songs, some of the lower notes come out very well, others dont!
So to reply to 89grands question, the bass response is not good.