cutting

Hey yall. So on my drive home today my system started cutting out and it got to the point that only my sub was putting out anything. I played around with my radio and realized I can make it happen when I focus my audio to my front left speaker. Nothing comes out and if the front left speaker is...

Im having an issue where my audio just started cutting out for a out a second than the music comes back on but playing at a fast pace like if its fast forwarding to the seconds it cut out. Any ideas why?