ok so im confused on what exactly my problem is, a couple of days ago i was going down the freeway and all of a sudden i had no sound coming out of the speakers, at first i thought i lost the radio station signal but when i change to another station or go to cd/ipod mode i still get no sound, but when i turn off the radio and turn it back on i get a pop noise that seems to come from the speakers

so im wondering if theres a fuse for the speakers that i would need to replace or did all four of my speakers blow on me