So I got into my exploder today and notice that my sub was a lot quiter than normal. I have checked to see if all of the wiring was still in tact and it is. I pulled the sub out and played it free air and it barely moved the sub(sa-15). My amp(saz2500) powers on like it should. I never heard a pop or anything and the sub has never cut out. It just seems like the sub is only seeing a few watts. I have a volt meter on the dash and it has never dropped below 14. Any suggestions on the problem??