W890i cracking sound

hi
in my w890i when i increase/reduce the volume or when i stop a song i hear a cracking sound this only happens when i have megabass or bass in equlizer.
i also notice these sounds when i have my headphone atached to the phone.

Does anyone have this problem?

they changed my phone and the new phone has same cracking sound
and i contacted SE and they told me that this sound was normal for w890i
and when i asked them why k800 doen't have this craking sound they told me that "sound card" are not same in these phones.


Does anyone have this problem?

can't any one share their experience with me