front 2 speakers just quit... what could be a possible problem?

I would first start with checking connections from your deck to your speakers...my logic is find the easiest fix first-->if it's easier to take your deck out, do that. If only one quit, chances are, it is that one speaker cable, but when both go out, you more than likely have a cable loose from where everything starts: your deck. OF course, if someone has played with the settings on your car, and put it to rear fade, then nothing's broken, and you should throw a pie in the last person's face because they changed your settings without asking you...