2 Alpine mrx-m110 not playing

OK I am kind of new to forum thing so here we go.... My setup 2 Alpine m110 with a 1800 kinetic battery a foot away pushing 2 type r12s on pioneer head unit. Now here's what I'm not able to figure out it was working great then out of nowhere it just stopped both amps. So here's what I have tried both subs on my old crunch 2000 they are fine then tried each amp on bench no nothing I could see one but both at same time. If somebody has an idea I'm not looking forward to dropping a grand or more on new amp