For the past few weeks when I would start my car in the morning I would hear a loud crackling / popping sounds for a few minutes through the front speakers regardless if the stereo was on or off . This past weekend I noticed that I have zero bass and thought it may be the amp(s)?

Anyone suggestions would be appreciated.

AM/FM also stopped working a few months ago.

 

The stereo is Bose Symphony II

 

Upon further review, the speaker in each door doesn't work.