i have an 05 WRX with the in-dash 6 disc cd player. i don't listen to the volume at too extreme levels, but a while ago i started noticing that every now and then a static-like sound comes through the speakers. at first it wasn't a big deal, but now it happens just about every 30 seconds or so, and the songs skip as well. has this happened to anyone else?

i know it's not a problem with the speakers being blown or anything, because when listening to the radio this does not happen. perhaps there's a wire lose?

if anyone has any ideas so i could maybe fix this problem myself without taking it into the shop and paying it would be much appreciated