Factory head unit possibly dying

Hey guys. Today while driving home my stereo started acting up as I was listening to a cassette. It started when all of a sudden, only the speaker in my passenger door was working. This went on for probably about 30 seconds then everything went back to normal. A few minutes later, only the speakers in my rear doors worked. This lasted for about the same amount of time as before then went back to normal. Is my whole head unit about to crap out or is it just with the tape deck?

 

cassette? lol ive had a channel cut in and out on a pioneer i had before.....in my case it was the radio as i checked all connections etc and they were fine. maybe try a different cassette and see what happens. good luck

 

What is this cassette device you speak of.....