Sorry to be late for the party, I hadn't logged in for ages.
What you are hearing there is actually in the recording. That distortion is the cause of poor and over-loud mastering which plagues that Red Hot Chilli Peppers album.
Lots of people were shocked by how distorted that album was (I mean bad, crackling distortion, not nice amplifier one) but since most people use crap equipment that crackling noise can't be heard (on MP3s that sound gets "fuzzed-up").
The fact you can hear the mastering distortion on that album is a sign that the headphones you have are good quality.