amp goes into protectionnot thermal

I have a kicker zx750.1 pushing two dvc 2-ohm kicker l7's, a pioneer head unit, the subs are wired up at a 2 ohm load, ground is nothing less than perfect, running a 4 gauge power and ground wire with a 150amp anl fuse about 6" from the battery, and the stock 130amp alternator(i know the danger with the fuse size). Everything works fine until i turn it up to about 42/62 then when it hits a note the amp goes into protection for a few seconds then turns right back on and if i dont turn the head unit down then it does the same thing. Any help is appreciated but please no telling me to check the ground or to check fuses. Thanx