Speakers stopped working and air vents woulint work

A few days ago, my vents wouldn't blow as I started the drive, they started working properly and haven't had an issue with that since. Today, as I got into my vehicle. My radio speaker s worked fine. A minute later, my right front passenger speaker stopped working and made a loud pooping sound every time I turned the station. A few miles down the road, all the speakers stopped working. Radio itself seems to work fine and plays CDs as well but nothing is coming out of speakers. Any suggestions