I have a Memphis Audio PRX-1.1500 amp and 2-12" Memphis Audio M6's dual 4 oh subs. They used to be really loud for about a month and then it started going into protection mode so I reset the gain and backed it off more and now it's about half the volume that it was to begin with and still going in for into protection mode when I turn it up. I have checked all fuses, grounds and power wires, and speaker wires and can't figure out what has changed. Please help!