I have a 97 avenger with an infinity system with an amp. The problem I'm having is the back left speaker suddenly became very quiet. It still produces sound but not near as much as it should. I cheched the speaker and thats still good. Anyone have any ideas?

 

cheack the wires.

 

I have checked every wire i can think of but still no improvement. I can't figure out why it happened all of the sudden.

 

Try swapping the speaker plugs around (left side with the right side, etc.). Sounds like a fried coil, but you never know.