O.K. I have a problem, I hit a sign

, a good jolt to the car, And now my front speakers are extremely staticky(probably not a word). The deck is stock(so there's a harness in the back of it)and I think I jarred a wire loose. Does this sound plausible?
I'm really pissed about this because I've been listening to the tunes out of the back speakers(which are perfectly fine) and it's hella annoying.
Anybody know somebody in ottawa that can look at it?....not an expensive car audio place. and if not, how much do you think this is gonna cost me to fix?