I currently have an aftermarket Alpine CD player connect to my stock Bose speakers in my 1994 Camaro for the last 2 years and i have never had a problem. Now all of a sudden the front speakers stop working about after 2 minutes after i start driving. This happens every morning and the stereo will work fine for a few minutes then the front will stop working while the rear speaker works and for the rest of the day.

What would cause this to happen?

Thanks in advance.