I have a single 12" Skar Audio SDR-12 D4 , hooked up to a alpine mrp-1000 v-power mono block amp. So just recently it's all of a sudden when I raise the volume to around 20 the bass cuts off. What would he the issue? I've checked fuses, wires, connections and can't seem to figure out the issue. My deck settings are all at zero. On my amp, the bass boost is at zero. Can someone help me?