needing help blow subs

I have a rockville rxd m4 6000 w peak amp told puts out 1512 rms cea I just installed it with 2 boss 12s p129 at 1 ohm ran amp at 70% head unit at 80% each speaker was in 1.2 cf sealed box they blew after a hour sounded good for a min. I have spoke to company and they are going to...