Ok, I have an spl 2400 watt amp powering 2 rockferd 15's. Two days ago I was driving and the subs just shut off and now the safety light is blinking on my amp. I checked the ground and thats not the problem. I checked the speaker wire and thats not the problem either. My subs are making a low pulsing sound though. So anyway i have no freakin clue about whats wrong with the whole setup. If anyone knows how to fix this please tell me.