I have a 2012 3.5 Sr and i noticed yesterday that my rear left subwoofer (behind my head rest) was making a winning sound and if I play a song with light bass, it get louder. but prior to that, an hour or so before i was driving and I heard a loud pop. I don’t usually listen to pretty loud music. However, my radio hasn’t exceed 15 in the past two weeks. So can anybody tell em weither not my speaker is blown before i let an audio shop look at it. Thanks. P.S. I have the Bose sound system.